Regional Board 8 - Santa Ana Region CATEGORY 5 Final 2016 Integrated Report (CWA Section 303(d) List / 305(b) Report)
2016 CALIFORNIA 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS*
 
 REGION  WATER BODY NAME WATER TYPE WATERSHED*
CALWATER / USGS HUC
  • POLLUTANT
    • POTENTIAL SOURCES
  • Relevant Notes
ESTIMATED AREA ASSESSED FIRST YEAR LISTED TMDL REQUIREMENT STATUS**  DATE***

8

Anaheim Bay

Bay & Harbor

80111000  /  18070201
  • Nickel
    • Source Unknown

402 Acres

2002

5A

2019
    This listing was made by USEPA.
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

402 Acres

1800

5A

2019
    This listing was made by USEPA.
  • Toxicity
    • Source Unknown

402 Acres

2014

5A

2019


8

Balboa Beach

Coastal & Bay Shoreline

80114000  /  18070201
  • DDT (Dichlorodiphenyltrichloroethane)
    • Source Unknown

1.8 Miles

2006

5A

2019
  • Dieldrin
    • Source Unknown

1.8 Miles

2006

5A

2019
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

1.8 Miles

2006

5A

2019


8

Big Bear Lake

Lake & Reservoir

80171000  /  18070203
  • Chlordane
    • Source Unknown

2865 Acres

2014

5A

2027
  • DDT (Dichlorodiphenyltrichloroethane)
    • Source Unknown

2865 Acres

2014

5A

2027
  • Mercury
    • Source Unknown

2865 Acres

1994

5A

2007
  • Noxious aquatic plants
    • Source Unknown

2865 Acres

1994

5B

2007
  • Nutrients
    • Construction/Land Development

2865 Acres

1994

5B

2007
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

2865 Acres

2006

5A

2019


8

Bolsa Bay Marsh

Estuary

80111000  /  18070201
  • Toxicity
    • Source Unknown

44 Acres

2014

5A

2027


8

Bolsa Chica Channel

River & Stream

80111000  /  18070201
  • Ammonia (Unionized)
    • Source Unknown

5.1 Miles

2010

5A

2021
  • Indicator Bacteria
    • Source Unknown

5.1 Miles

2010

5A

2021
  • pH
    • Source Unknown

5.1 Miles

2010

5A

2021


8

Bolsa Chica Ecological Reserve

Estuary

80111000  /  18070201
  • Toxicity
    • Source Unknown

239 Acres

2014

5A

2027


8

Bolsa Chica State Beach

Coastal & Bay Shoreline

80111000  /  18070201
  • Copper
    • Source Unknown

2.6 Miles

2002

5A

2019
    This listing was made by USEPA.
  • Nickel
    • Source Unknown

2.6 Miles

2002

5A

2019
    This listing was made by USEPA.


8

Bonita Creek

Coastal & Bay Shoreline

80111000  /  18070201
  • Benthic Community Effects
    • Source Unknown

3.8 Miles

2014

5A

2029
  • Toxicity
    • Source Unknown

3.8 Miles

2014

5A

2029


8

Borrego Creek (from Irvine Blvd to San Diego Creek Reach 2)

River & Stream

80111000  /  18070203
  • Ammonia (Unionized)
    • Source Unknown

3.2 Miles

2010

5A

2021
  • Indicator Bacteria
    • Source Unknown

3.2 Miles

2010

5A

2021


8

Buck Gully Creek

River & Stream

80111000  /  18070201
  • Indicator Bacteria
    • Source Unknown

0.3 Miles

2014

5A

2019
    Listing is downstream of Pacific Coast Highway. While this Decision was based on a sufficient number of exceedances of the E. coli Single Sample objective, it should be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired. Further, the Single Sample objective was only used because of the lack of representative 30-day, 5-sample Geomean values. When representative 30-day, 5-smple Geomean values are collected the Single Sample E. coli LOE will be retired.


8

Chino Creek Reach 1A (Santa Ana River R5 confl to just downstream of confl with Mill Creek)

River & Stream

80121000  /  18070203
  • Indicator Bacteria
    • Agriculture
    • Dairies
    • Urban Runoff/Storm Sewers

0.79 Miles

2014

5B

2007
  • Nutrients
    • Source Unknown

0.79 Miles

2010

5A

2019


8

Chino Creek Reach 1B (Mill Creek confl to start of concrete lined channel)

River & Stream

80121000  /  18070203
  • Indicator Bacteria
    • Agriculture
    • Dairies
    • Urban Runoff/Storm Sewers

7 Miles

2014

5B

2007
    It should be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired. Further, the Single Sample objective was presented only because of the lack of representative 30-day, 5-sample Geomean values, as per the Region 8 Basin Plan (2016 update) on page 4-17, footnote 3. When representative 30-day, 5-sample Geomean values are collected the Single Sample E. coli LOE will be retired.
  • Nutrients
    • Source Unknown

7 Miles

2010

5A

2019


8

Chino Creek Reach 2 (Beginning of concrete channel to confl w San Antonio Creek)

River & Stream

80121000  /  18070203
  • Indicator Bacteria
    • Unknown Nonpoint Source

2.5 Miles

2014

5B

2007
  • pH
    • Source Unknown

2.5 Miles

2010

5A

2021


8

Cucamonga Creek Reach 1 (Valley Reach)

River & Stream

80121000  /  18070203
  • Cadmium
    • Source Unknown

9.6 Miles

2010

5A

2021
  • Copper
    • Source Unknown

9.6 Miles

2010

5A

2021
  • Lead
    • Source Unknown

9.6 Miles

2010

5A

2021
  • Zinc
    • Source Unknown

9.6 Miles

2010

5A

2019


8

Cucamonga Creek Reach 2 (Mountain Reach)

River & Stream

80124020  /  18070203
  • pH
    • Source Unknown

13 Miles

2010

5A

2021


8

East Garden Grove Wintersburg Channel

River & Stream

80111000  /  18070201
  • Ammonia (Unionized)
    • Source Unknown

2.9 Miles

2010

5A

2021


8

Elsinore, Lake

Lake & Reservoir

80231000  /  18070202
  • DDT (Dichlorodiphenyltrichloroethane)
    • Source Unknown

2431 Acres

2014

5A

2027
  • Nutrients
    • Unknown Nonpoint Source

2431 Acres

1994

5B

2005
  • Organic Enrichment/Low Dissolved Oxygen
    • Unknown Nonpoint Source

2431 Acres

1994

5B

2005
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

2431 Acres

2006

5A

2027
  • Toxicity
    • Source Unknown

2431 Acres

2006

5A

2027


8

Goldenstar Creek

River & Stream

80126000  /  18070203
  • Indicator Bacteria
    • Source Unknown

2.4 Miles

2010

5A

2021


8

Grout Creek

River & Stream

80171000  /  18070203
  • Nutrients
    • Source Unknown

3.5 Miles

1994

5A

2008


8

Huntington Beach State Park

Coastal & Bay Shoreline

80111000  /  18070201
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

5.8 Miles

2006

5A

2019


8

Huntington Harbour

Bay & Harbor

80111000  /  18070201
  • Chlordane
    • Source Unknown

221 Acres

2006

5A

2019
  • Copper
    • Source Unknown

221 Acres

2002

5A

2019
    This listing was made by USEPA.
  • Indicator Bacteria
    • Source Unknown

221 Acres

2014

5A

2019
    The data shows that the impairment is focused at the 11th Street, Anderson Street Marina, Clubhouse Marina and Sunset Aquatic Park locations. These locations continue to exceed the enterococcus standard, however 2009-10 data seems to show improvement over 1999-2008 data. LOE 7010 appears to be a duplicative subset of LOE 7936 and was not used in making this decision.
  • Lead
    • Source Unknown

221 Acres

2006

5A

2019
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

221 Acres

2014

5A

2019
    This listing was made by USEPA.
  • Toxicity
    • Source Unknown

221 Acres

2014

5A

2025


8

Knickerbocker Creek

River & Stream

80171000  /  18070203
  • Indicator Bacteria
    • Source Unknown

2 Miles

2014

5A

2005
    For 2006, pathogens was moved by USEPA from the being addressed list back to the 303(d) list pending completion and USEPA approval of a TMDL.


8

Little Corona Del Mar Beach

Coastal & Bay Shoreline

80114000  /  18070201
  • Indicator Bacteria
    • Source Unknown

0.27 Miles

2014

5A

2029


8

Los Trancos Creek (Crystal Cove Creek)

River & Stream

80111000  /  18070201
  • Indicator Bacteria
    • Source Unknown

0.19 Miles

2014

5A

2019
    As a result of revisions to Region 8's Basin Plan, Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. Therefore these Lines of Evidence do not provide sufficient justification for listing. It should be noted that these Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired. Listing is downstream of Pacific Coast Highway.


8

Mill Creek (Prado Area)

River & Stream

80121000  /  18070203
  • Indicator Bacteria
    • Dairies

1.6 Miles

2014

5B

2007
  • Nutrients
    • Source Unknown

1.6 Miles

1996

5A

2019
  • Total Suspended Solids (TSS)
    • Source Unknown

1.6 Miles

1996

5A

2019


8

Mill Creek Reach 1

River & Stream

80156000  /  18070203
  • Indicator Bacteria
    • Source Unknown

12 Miles

2014

5A

2019


8

Morning Canyon Creek

River & Stream

80111000  /  18070201
  • Indicator Bacteria
    • Source Unknown

1.1 Miles

2010

5A

2021


8

Mountain Home Creek

River & Stream

80158000  /  18070203
  • Indicator Bacteria
    • Source Unknown

3.7 Miles

2014

5A

2019
    Data collected by Regional Board staff in 2012 (outside of the 2014 Listing Cycle data solicitation) support the delisting of Mountain Home Creek for Indicator Bacteria in the next listing cycle.


8

Mountain Home Creek, East Fork

River & Stream

80158000  /  18070203
  • Indicator Bacteria
    • Source Unknown

5.1 Miles

2014

5A

2019


8

Newport Bay, Lower (entire lower bay, including Rhine Channel, Turning Basin and South Lido Channel to east end of H-J Moorings)

Bay & Harbor

80114000  /  18070201
  • Chlordane
    • See TMDL documentation

767 Acres

2006

5B

2013
  • Copper
    • Marinas and Recreational Boating

767 Acres

2006

5A

2019
  • DDT (Dichlorodiphenyltrichloroethane)
    • See TMDL documentation

767 Acres

1990

5B

2013
  • Indicator Bacteria
    • Source Unknown

767 Acres

2010

5B

2000
    The following LOEs had been incorrectly linked to Lower Newport Bay during the 2010 cycle : 8147, 8148, 8149, 8150, 8151, 8152, 8153, 8154, 8155, 8156, 8157, 8158, 8159, 8160, 8161, 8162, 28355, 28357, 28361, 28367, 28373, 28377, 28379, 28381, 28383. They have not been used in the Final Use Rating in the 2014 cycle and will be retired prior to the next cycle. They have been copied over to Upper Newport Bay (where the sampling points are located) and have new LOE #'s. LOE 26162 was created during the 2010 cycle and incorrectly combined sampling locations in both Upper and Lower Newport Bay. The data in LOE 26162 has been reanalyzed and 2 new LOEs have been created for those data in the proper waterbodies. LOE 26162 is not used in the Final Use Rating in the 2014 cycle and will be retired prior to the next cycle. In the 2010 cycle, the Shellfish Harvest Objective that was used in the LOEs was the Ocean Plan Total Coliform value, rather than the existing Region 8 Basin Plan Objective that was based on Fecal Coliform. While combining the LOEs written using the Ocean Plan Total Coliform objective results in a delisting for the Shellfish Harvest Beneficial Use, analysis of the 2008 -2010 Fecal Coliform data from the Beach Watch program resulted in 7 months of exceedance out of 23 months (where samples were collected) and based on weight of evidence, the decision was made to leave the Shellfish Harvest listing in place for Fecal Coliform.
  • Nutrients
    • Source Unknown

767 Acres

1992

5B

1999
  • PCBs (Polychlorinated biphenyls)
    • See TMDL documentation

767 Acres

1990

5B

2013
  • Toxicity
    • Source Unknown

767 Acres

2014

5A

2019


8

Newport Bay, Upper (Ecological Reserve)

Estuary

80111000  /  18070201
  • Chlordane
    • See TMDL documentation

653 Acres

2006

5B

2013
  • Copper
    • Marinas and Recreational Boating

653 Acres

2006

5A

2007
  • DDT (Dichlorodiphenyltrichloroethane)
    • See TMDL documentation

653 Acres

2006

5B

2013
  • Indicator Bacteria
    • Source Unknown

653 Acres

2010

5B

2000
    The following LOEs had been incorrectly linked to Upper Newport Bay during the 2010 cycle : 8075, 8076, 8077 and 8078. They have not been used in the Final Use Rating in the 2014 cycle and will be retired prior to the next cycle. They have been copied over to Lower Newport Bay (where the sampling points are located) and have new LOE #'s.
  • Malathion
    • Source Unknown

653 Acres

2014

5A

2027
  • Nutrients
    • Source Unknown

653 Acres

2006

5B

1999
  • PCBs (Polychlorinated biphenyls)
    • See TMDL documentation

653 Acres

2006

5B

2013
  • Sedimentation/Siltation
    • Agriculture
    • Channel Erosion
    • Construction/Land Development
    • Erosion/Siltation

653 Acres

2006

5B

1999
  • Toxicity
    • Source Unknown

653 Acres

2014

5A

2027


8

Newport Slough

River & Stream

80111000  /  18070201
  • Indicator Bacteria
    • Source Unknown

1.3 Miles

2014

5A

2021


8

Peters Canyon Channel

River & Stream

80111000  /  18070201
  • Benthic Community Effects
    • Source Unknown

3 Miles

2014

5A

2027
  • DDT (Dichlorodiphenyltrichloroethane)
    • See TMDL documentation

3 Miles

2006

5B

2013
    The USEPA approved the Newport Bay Organochlorine compounds TMDL on November 12, 2013 which includes this pollutant (Total DDT-sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) for Peters Canyon Channel.
  • Indicator Bacteria
    • Source Unknown

3 Miles

2010

5A

2021
    While this Decision was based on a sufficient number of exceedances of the E. coli Single Sample objective, it should be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired. Further, the Single Sample objective was only used because of the lack of representative 30-day, 5-sample Geomean values. When representative 30-day, 5-sample Geomean values are collected the Single Sample E. coli LOE will be retired.
  • Malathion
    • Source Unknown

3 Miles

2014

5A

2027
  • Selenium
    • Source Unknown

3 Miles

2014

5A

2027
  • Toxaphene
    • See TMDL documentation

3 Miles

2006

5B

2013
  • Toxicity
    • Source Unknown

3 Miles

2014

5A

2025
  • pH
    • Source Unknown

3 Miles

2010

5A

2021


8

Prado Flood Control Basin

Wetland, Freshwater

80121000  /  18070203
  • pH
    • Source Unknown

6834 Acres

2014

5A

2027


8

Prado Park Lake

Lake & Reservoir

80121000  /  18070203
  • Indicator Bacteria
    • Source Unknown

90 Acres

2014

5B

2007
    As a result of revisions to Region 8's Basin Plan, Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. It should be noted that these Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired.
  • Nutrients
    • Source Unknown

90 Acres

1998

5A

2019


8

Rathbone (Rathbun) Creek

River & Stream

80171000  /  18070203
  • Cadmium
    • Source Unknown

4.7 Miles

2010

5A

2021
  • Copper
    • Source Unknown

4.7 Miles

2010

5A

2021
  • Nutrients
    • Source Unknown

4.7 Miles

1994

5A

2008
  • Sedimentation/Siltation
    • Source Unknown

4.7 Miles

1994

5A

2006


8

Rhine Channel

Bay & Harbor

80114000  /  18070201
  • Copper
    • Source Unknown

20 Acres

2006

5A

2019
  • Lead
    • Source Unknown

20 Acres

2006

5A

2019
  • Mercury
    • Source Unknown

20 Acres

2006

5A

2019
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

20 Acres

2006

5A

2019
  • Toxicity
    • Source Unknown

20 Acres

2014

5A

2019
  • Zinc
    • Source Unknown

20 Acres

2006

5A

2019


8

San Antonio Creek

River & Stream

80121000  /  18070203
  • pH
    • Source Unknown

23 Miles

2010

5A

2021


8

San Diego Creek Reach 1

River & Stream

80111000  /  18070201
  • Benthic Community Effects
    • Source Unknown

7.8 Miles

2014

5A

2027
  • DDT (Dichlorodiphenyltrichloroethane)
    • See TMDL documentation

7.8 Miles

2014

5B

2013
    The USEPA approved the Newport Bay Organochlorine compounds TMDL on November 12, 2013 which includes this pollutant (Total DDT-sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD) for San Diego Creek. The data used for the TMDL assessment includes additional data and may use different assessment guidelines than those used in the integrated report. Nonetheless, it is important to note that this pollutant is being addressed by an USEPA approved TMDL.
  • Indicator Bacteria
    • Source Unknown

7.8 Miles

2014

5A

2019
    While this Decision was based on a sufficient number of exceedances the of E. coli Single Sample objective, it should be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Enterococcus, Fecal Coliform and Total Coliform LOEs will be retired. Further, the Single Sample objective was only used because of the lack of representative 30-day, 5-sample Geomean values, as per the Region 8 Basin Plan (2016 update) on page 4-17, footnote 3. When representative 30-day, 5-sample Geomean values are collected the Single Sample E. coli LOE will be retired.
  • Malathion
    • Source Unknown

7.8 Miles

2014

5A

2027
  • Nutrients
    • Source Unknown

7.8 Miles

1996

5B

1999
  • Sedimentation/Siltation
    • Source Unknown

7.8 Miles

1996

5B

1999
  • Selenium
    • Source Unknown

7.8 Miles

2006

5A

2007
  • Toxaphene
    • See TMDL documentation

7.8 Miles

2006

5B

2013
  • Toxicity
    • Source Unknown

7.8 Miles

2014

5A

2025


8

San Diego Creek Reach 2

River & Stream

80111000  /  18070201
  • Benthic Community Effects
    • Source Unknown

6.3 Miles

2014

5A

2027
  • Indicator Bacteria
    • Source Unknown

6.3 Miles

2010

5A

2021
    While this Decision was based on a sufficient number of exceedances the of E. coli Single Sample objective, it should be noted that when representative 30-day, 5-sample Geomean values are collected the Single Sample E. coli LOE will be retired.
  • Nutrients
    • Agriculture
    • Groundwater Loadings
    • Urban Runoff/Storm Sewers

6.3 Miles

1996

5B

1999
  • Sedimentation/Siltation
    • Agriculture
    • Channel Erosion
    • Construction/Land Development
    • Erosion/Siltation

6.3 Miles

1996

5B

1999
  • Toxicity
    • Unknown Nonpoint Source

6.3 Miles

2014

5B

2004
    Although the diazinon/chlorpyrifos TMDL was developed and implemented to also address unknown toxicity; new data assessed suggests that the pollutants addressed in this TMDL were not the only pollutants causing toxicity. The toxicity LOE (82244) states that the toxicity tests that exhibited significant toxicity included Ceriodaphnia reproduction and Hyallela survival. Toxicity to hyallela could suggest pyrethroid-related toxicity.


8

San Timoteo Creek Reach 1A (Santa Ana River to Confluence to Barton Rd)

River & Stream

80152000  /  18070203
  • Indicator Bacteria
    • Source Unknown

3.3 Miles

2014

5A

2029
    This Decision was based on a sufficient number of exceedances of the E. coli Geomean objective to trigger a 'Not Supporting' listing. The Region 8 Basin Plan states that where a representative E. coli geometric mean can be calculated, single sample maximum values shall not be used for assessment (page 4-17, footnote 3), therefore the E. coli single sample maximum objective LOE was not used in the Final Use Rating. It should also be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Total Coliform LOEs will be retired.


8

San Timoteo Creek Reach 2 (Gage at San Timoteo to confluence with Yucaipa Creek)

River & Stream

80161000  /  18070203
  • Indicator Bacteria
    • Source Unknown

3.9 Miles

2014

5A

2029
    This Decision was based on a sufficient number of exceedances of the E. coli Geomean objective to trigger a 'Not Supporting' listing. The Region 8 Basin Plan states that where a representative E. coli geometric mean can be calculated, single sample maximum values shall not be used for assessment (page 4-17, footnote 3), therefore the E. coli single sample maximum objective LOE was not used in the Final Use Rating. It should also be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Total Coliform LOEs will be retired.


8

San Timoteo Creek Reach 3 (Yucaipa Creek to Headwaters)

River & Stream

80152000  /  18070202
  • Indicator Bacteria
    • Source Unknown

23 Miles

2014

5A

2029
    This Decision was based on a sufficient number of exceedances of the E. coli Geomean objective to trigger a 'Not Supporting' listing. The Region 8 Basin Plan states that where a representative E. coli geometric mean can be calculated, single sample maximum values shall not be used for assessment (page 4-17, footnote 3), therefore the E. coli single sample maximum objective LOE was not used in the Final Use Rating. It should also be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Total Coliform LOEs will be retired.


8

Santa Ana River Reach 6

River & Stream

80157000  /  18070203
  • Cadmium
    • Source Unknown

27 Miles

2010

5A

2021
  • Copper
    • Source Unknown

27 Miles

2010

5A

2021
  • Lead
    • Source Unknown

27 Miles

2010

5A

2021


8

Santa Ana River, Reach 4

River & Stream

80127000  /  18070203
  • Indicator Bacteria
    • Source Unknown

14 Miles

2014

5A

2019


8

Santiago Creek, Reach 4

River & Stream

80112000  /  18070203
  • Salinity/TDS/Chlorides
    • Source Unknown

9.8 Miles

1996

5A

2019
  • Toxicity
    • Source Unknown

9.8 Miles

2014

5A

2027


8

Seal Beach

Coastal & Bay Shoreline

80111000  /  18070201
  • Indicator Bacteria
    • Source Unknown

0.53 Miles

2014

5A

2019
    Impaired 50 yards around drain at 1st Street.
  • PCBs (Polychlorinated biphenyls)
    • Source Unknown

0.53 Miles

2006

5A

2019


8

Serrano Creek

River & Stream

80111000  /  18070201
  • Ammonia (Unionized)
    • Source Unknown

7.2 Miles

2010

5A

2021
  • Benthic Community Effects
    • Source Unknown

7.2 Miles

2014

5A

2027
  • Indicator Bacteria
    • Source Unknown

7.2 Miles

2010

5A

2021
  • Toxicity
    • Source Unknown

7.2 Miles

2014

5A

2027
  • pH
    • Source Unknown

7.2 Miles

2010

5A

2021


8

Silverado Creek

River & Stream

80112000  /  18070203
  • Salinity/TDS/Chlorides
    • Source Unknown

11 Miles

1996

5A

2019
  • Toxicity
    • Source Unknown

11 Miles

2014

5A

2027


8

Summit Creek

River & Stream

80171000  /  18070203
  • Nutrients
    • Source Unknown

1.5 Miles

1998

5A

2008


8

Talbert Channel (Orange County)

River & Stream

80111000  /  18070201
  • Toxicity
    • Source Unknown

5.5 Miles

2014

5A

2029


8

Warm Creek

River & Stream

80152000  /  18070203
  • Indicator Bacteria
    • Source Unknown

7.2 Miles

2014

5A

2029
    This Decision was based on a sufficient number of exceedances of the E. coli Geomean objective to trigger a 'Not Supporting' listing. The Region 8 Basin Plan states that where a representative E. coli geometric mean can be calculated, single sample maximum values shall not be used for assessment (page 4-17, footnote 3), therefore the E. coli single sample maximum objective LOE was not used in the Final Use Rating. It should also be noted that Enterococcus, Fecal Coliform and Total Coliform objectives no longer apply to the REC 1 Beneficial Use for fresh waters in Region 8. As such the Total Coliform LOEs will be retired. In addition, as representative E. coli geometric means exist, the E. coli single sample maximum LOE will also be retired.