Draft California 2020 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 3 - Central Coast Region

Water Body Name: Pacific Ocean at Cowell Beach (Santa Cruz County)
Water Body ID: CAX3041205320021001213048
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
129326
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
Pollutant: Fecal Coliform
Final Listing Decision: Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2018)
Revision Status Revised
Reason for Delisting: Applicable WQS attained; due to restoration activities
Expected TMDL Completion Date: 2027
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective.

This waterbody is being considered for removal from the CWA section 303(d) List under section 4.3 of the Listing Policy using the fecal coliform objective.

A total of 29 lines of evidence of fecal coliform data were evaluated for this waterbody. Of these lines of evidence, 4 are based on historic fecal coliform data collected prior to 2010. Twenty-five lines of evidence are based on recent fecal coliform data, collected since 2017, and compared to the fecal coliform bacteria water quality objectives.

In accordance with section 6.1.5.3 of the Listing Policy, to be evaluated to develop the list, the data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data is available to sufficiently assess the water quality standard. Unrepresentative data will likely result in incorrectly placing or not placing a water body segment on the CWA section 303(d) List. This could result in the unnecessary expenditure of public resources or missing a problem completely. The 6 historic lines of evidence were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

The recent data were collected during 2017-2019. There are adequate recent data to determine beneficial use support in accordance with the Listing Policy. The recent data are representative of existing conditions in the waterbody and represent a range of hydrologic conditions (both wet and dry years).

With respect to the recent lines of evidence, 3 of 201 geometric means for fecal coliform calculated exceed the fecal coliform bacteria objective. For these data, Listing Policy section 4.3 instructs to use the binomial distribution table in section 4.2. Using the applicable exceedance frequency, the number of exceedances is sufficient to remove this waterbody from the list.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification to delist this waterbody from the 303(d) list.

The data used satisfies the data quality requirements (section 6.1.4) and data quantity requirements (section 6.1.5) of the Listing Policy.

Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.
 
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150046
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 115
Number of Exceedances: 22
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 22 of the 115 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-02-06 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218164
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 74
Number of Exceedances: 8
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 8 of the 74 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150065
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 19
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218117
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 61
Number of Exceedances: 5
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 5 of the 61 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218169
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2018-03-12 and 2018-04-02 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218155
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 15 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150053
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 19
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-02-06 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218051
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 15 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150059
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 8
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 8 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-B
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2017-05-15 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150058
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 19
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 1 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150052
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 19
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150010
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 124
Number of Exceedances: 13
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 13 of the 124 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219223
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 16
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 16 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150034
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 110
Number of Exceedances: 10
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 10 of the 110 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150031
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 121
Number of Exceedances: 25
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 25 of the 121 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150048
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 19
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150039
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 30
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 2 of the 30 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219226
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 109
Number of Exceedances: 17
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 17 of the 109 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150022
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 109
Number of Exceedances: 19
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 19 of the 109 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218043
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O494
Temporal Representation: The samples were collected between the days of 2018-03-26 and 2018-03-26 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19505
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 21
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 0 of 21 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the 30-day geometric mean for fecal coliform shall not exceed 200 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell's Beach @ the Stairs)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19480
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 22
Number of Exceedances: 3
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 3 of 22 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the 30-day geometric mean for fecal coliform shall not exceed 200 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell Beach West of the Wharf)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19500
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 111
Number of Exceedances: 10
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 10 of 111 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell Beach West of the Wharf)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19506
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 90
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 1 of 90 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell's Beach @ the Stairs)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218158
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 62
Number of Exceedances: 5
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 5 of the 62 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218157
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 15 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218099
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 62
Number of Exceedances: 3
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 3 of the 62 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150017
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 121
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 2 of the 121 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129326, Fecal Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218040
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 15 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
 
DECISION ID
129327
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
Pollutant: Total Coliform
Final Listing Decision: Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2018)
Revision Status Revised
Sources: A Source Unknown
Expected TMDL Completion Date: 2027
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Twenty-seven lines of evidence are available in the administrative record to assess this pollutant. Eight hundred and forty-four of the 1059 median samples exceed the SHELL total coliform water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Eight hundred and forty-four of the 1059 median samples exceed the SHELL total coliform water quality objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.

In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation: In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.
 
State Board Decision Recommendation: After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150060
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 110
Number of Exceedances: 82
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 82 of the 110 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150014
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 96
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 96 of the 121 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150041
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 8
Number of Exceedances: 4
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 4 of the 8 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-B
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2017-05-15 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219222
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 106
Number of Exceedances: 74
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 74 of the 106 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218026
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 48
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 48 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218153
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 2
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 2 of the 2 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2018-03-12 and 2018-04-02 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150056
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 118
Number of Exceedances: 102
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 102 of the 118 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149983
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 108
Number of Exceedances: 85
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 85 of the 108 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150008
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 8
Number of Exceedances: 6
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 6 of the 8 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-B
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2017-05-15 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150012
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 119
Number of Exceedances: 87
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 87 of the 119 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218154
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 60
Number of Exceedances: 43
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 43 of the 60 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218049
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 40
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 40 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218096
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 35
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 35 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 56008
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 384
Number of Exceedances: 173
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Beach Watch data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 173 of 384 samples exceed the criterion for Coliform, Total.
Data Reference: Data for Region 3 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Ocean Plan (2009) states the following: At all areas where shellfish may be harvested for human consumption, the following bacterial objectives shall be maintained throughout the water column: Ten percent of the samples collected during any 30-day period shall not exceed 230 MPN/100mL.
Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at 2 monitoring sites [ Cowell's Beach @ the Stairs, Cowell Beach West of the Wharf]
Temporal Representation: Data was collected over the time period 1/3/2007-8/23/2010.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150013
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 81
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 81 of the 121 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218122
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 43
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 43 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218032
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 41
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 41 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218024
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 60
Number of Exceedances: 39
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 39 of the 60 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150055
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 110
Number of Exceedances: 86
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 86 of the 110 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149980
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 119
Number of Exceedances: 82
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 82 of the 119 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150050
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 100
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 100 of the 121 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150009
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 118
Number of Exceedances: 111
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 111 of the 118 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218028
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2018-03-12 and 2018-04-02 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150049
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 121
Number of Exceedances: 119
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 119 of the 121 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150032
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 108
Number of Exceedances: 89
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 89 of the 108 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219225
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 106
Number of Exceedances: 87
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 87 of the 106 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129327, Total Coliform
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218031
 
Pollutant: Total Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Shellfish Harvesting
 
Number of Samples: 62
Number of Exceedances: 34
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 34 of the 62 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
 
DECISION ID
129325
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
Pollutant: Enterococcus
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status Revised
Sources: A Source Unknown
Expected TMDL Completion Date: 2033
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective.

This waterbody is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy using the enterococci objective.

A total of 32 lines of evidence of enterococci data were evaluated for this waterbody. Of these lines of evidence, 6 are based on historic enterococci data collected prior to 2010. 26 lines of evidence are based on recent enterococci data, collected since 2010, and compared to the enterococci bacteria water quality objectives.

In accordance with section 6.1.5.3 of the Listing Policy, to be evaluated to develop the list, the data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data is available to sufficiently assess the water quality standard. Unrepresentative data will likely result in incorrectly placing or not placing a water body segment on the CWA section 303(d) List. This could result in the unnecessary expenditure of public resources or missing a problem completely. The 6 historic lines of evidence were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy.

The recent data were collected during 2010-2019. There are adequate recent data to determine beneficial use support in accordance with the Listing Policy. The recent data are representative of existing conditions in the waterbody and represent a range of hydrologic conditions (both wet and dry years).

With respect to the recent lines of evidence, 748 of 1706 geometric means for enterococci calculated from 2010-2019 exceed the enterococci objective. For these data, Listing Policy section 3.3 instructs to use the binomial distribution table in section 3.2. Using the applicable exceedance frequency, the number of exceedances is sufficient to place this waterbody on the list.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification to add this waterbody to the 303(d) list.

The data used satisfies the data quality requirements (section 6.1.4) and data quantity requirements (section 6.1.5) of the Listing Policy.

Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149974
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 30
Number of Exceedances: 14
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 14 of the 30 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219227
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 28
Number of Exceedances: 16
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 16 of the 28 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150043
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 90
Number of Exceedances: 53
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 53 of the 90 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218101
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 0 of the 2 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2018-03-12 and 2018-04-02 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218160
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 395
Number of Exceedances: 38
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 38 of the 395 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O494
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150040
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 29
Number of Exceedances: 16
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 16 of the 29 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-02-06 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150033
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 28
Number of Exceedances: 12
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 12 of the 28 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150015
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 28
Number of Exceedances: 17
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 17 of the 28 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218048
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 53
Number of Exceedances: 30
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 30 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149978
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 96
Number of Exceedances: 85
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 85 of the 96 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf
Temporal Representation: The samples were collected between the days of 2017-02-06 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218152
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 53
Number of Exceedances: 26
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 26 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149988
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 30
Number of Exceedances: 21
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 21 of the 30 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149977
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 89
Number of Exceedances: 65
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 65 of the 89 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150063
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 1 of the 3 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-B
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2017-05-15 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218053
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 53
Number of Exceedances: 35
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 35 of the 53 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218121
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 16
Number of Exceedances: 8
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 8 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-CW
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218119
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 106
Number of Exceedances: 21
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 21 of the 106 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O494
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150047
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 105
Number of Exceedances: 91
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 91 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Wharf-East
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150019
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 105
Number of Exceedances: 70
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 70 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 150064
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 105
Number of Exceedances: 48
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 48 of the 105 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Main
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218135
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 473
Number of Exceedances: 147
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 147 of the 473 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 219224
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 89
Number of Exceedances: 60
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 60 of the 89 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-C
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218106
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 16
Number of Exceedances: 7
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 7 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell-BC
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218145
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 106
Number of Exceedances: 47
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 47 of the 106 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): O490
Temporal Representation: The samples were collected between the days of 2010-09-09 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 149986
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 30
Number of Exceedances: 14
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 14 of the 30 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Water data for the 2020/2022 integrated report in Region 3.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2017-01-03 and 2019-07-22 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 56113
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 382
Number of Exceedances: 20
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Beach Watch Program data that is collected by each County's Environmental Health Department for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 20 of 382 samples exceed the criterion for Enterococci.
Data Reference: Data for Region 3 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) single sample maximum for enterococcus density shall not exceed 104 per 100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at 2 monitoring sites [ Cowell's Beach @ the Stairs, Cowell Beach West of the Wharf]
Temporal Representation: Data was collected over the time period 1/3/2007-8/23/2010.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: Water Board staff assessed Beach Watch Program data that is collected by each County's Environmental Health Department. There is no QA Project Plan but instead each County follows their own Quality Assurance Procedures
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19527
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 111
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 2 of 111 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell's Beach @ the Stairs)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19502
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 128
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 1 of 128 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell Beach West of the Wharf)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 56114
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 348
Number of Exceedances: 23
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: Twenty-three of the 348 geomeans exceeded the enterococcus objective.
Data Reference: Data for Region 3 Beach Watch.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at stations Cowell's Beach at the Stairs and Cowell Beach West of the Wharf.
Temporal Representation: The samples were collected approximately once a week from January 2007 to August 2010.
Environmental Conditions:
QAPP Information: The samples were collected for the Beach Watch program.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19501
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 0 of 26 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell Beach West of the Wharf)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 19507
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and results are as follows: 0 of 26 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Cowell Beach (Santa Cruz County) was collected at one AB411 monitoring site (Cowell's Beach @ the Stairs)
Temporal Representation: Data was collected over the time period 3/8/2004 - 12/26/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.
Environmental Conditions:
QAPP Information: QA information not available
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 129325, Enterococcus
Region 3     
Pacific Ocean at Cowell Beach (Santa Cruz County)
 
LOE ID: 218123
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 16
Number of Exceedances: 5
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean at Cowell Beach (Santa Cruz County) to determine beneficial use support and the results are as follows: 5 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference: Data file of Region 3 Beachwatch Data. Includes data from all coastal counties in Region 3 including: , Santa Barbara, Santa Cruz, San Luis Obispo, Monterey, Ventura, and San Mateo counties.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): Cowell
Temporal Representation: The samples were collected between the days of 2018-03-05 and 2019-06-10 .
Environmental Conditions:
QAPP Information: QAPP for 2020 Santa Cruz County Beachwatch data.
QAPP Information Reference(s): QAPP for 2020 Santa Cruz County Beachwatch data.