Sacramento-San Joaquin Bay-Delta Estuary Decision 1641 Compliance
The Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary (Bay-Delta Plan) establishes: (1) beneficial uses to be protected; (2) water quality objectives for the reasonable protection of beneficial uses; and (3) a program of implementation for achieving the water quality objectives. The beneficial uses to be protected include fish and wildlife, agricultural, municipal and industrial uses. The Bay-Delta Plan is not self-implementing: in State Water Board Revised Decision 1641, the State Water Board amended the water right license and permits for the State Water Project and Central Valley Project (collectively the Projects) to require the Projects to meet certain objectives in the Bay-Delta Plan. Specifically, Decision 1641 places responsibility on the Department of Water Resources and the U.S. Bureau of Reclamation for measures to ensure that specified water quality objectives are met. The flow, water quality, and monitoring requirements established by the State Water Board are summarized in Decision 1641, Tables 1-5 as follows:
- Table 1 (Water Quality Objectives for Municipal and Industrial Beneficial Uses),
- Table 2 (Water Quality Objectives for Agricultural Beneficial Uses),
- Table 3 (Water Quality Objectives for Fish and Wildlife Beneficial Uses).
- Table 4 (Chipps Island and Port Chicago Maximum Daily Average Electrical Conductivity), and
- Table 5 (Water Quality Compliance and Baseline Monitoring)
Footnotes to Table 3 refer to definitions and other requirements contained in Figure 1 (Sacramento Valley Water Year Hydrologic Classification), Figure 2 (San Joaquin Valley Water Year Hydrologic Classification), and Figure 3 (Formulas for NDOI and Percent Inflow Diverted).
Southern Delta Salinity Compliance Orders
- Order 2006-0006
- Order 2010-0002
- San Joaquin River Recirculation Feasibility Study
Low Head Pump Salinity Control Study, April 2011
Special Study: Evaluation of Dilution Flow to Meet Interior South Delta Water Quality Objectives, April 8
2011 »» Main Report through App C | App D through App G
Correspondence
Click on the year to expand and retract that year's information.
To receive a copy of any of the documents on this webpage please contact Bay-Delta@waterboards.ca.gov. In some cases, links to documents are provided.
- September 24, 2024 − Letter from Executive Director to USBR Re: Compliance with Decision 1641 San Joaquin River Flow Requirements in June
- August 5, 2024 − USBR Notification Re: Compliance with San Joaquin River Flow Requirements in June
- April 22, 2024 − DWR Notification of a Lapse in Benthic Sampling in March at San Pablo Bay near Pinole Point (Station 41) pursuant to the Water Quality and Baseline Monitoring Program
- January 22, 2024 - Letter from DWR Re: 2024 Plan for Construction and Operation of the South Delta Temporary Barriers Pursuant to Condition 5 of State Water Board Order 2010-0002
- December 22, 2023 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for November 2023
- October 24, 2023 − DWR Report of Salinity Conditions at South Delta Monitoring Stations for September 2023
- October 9, 2023 - Letter from Executive Director to USBR Re: Compliance with D-1641 San Joaquin River October Flow Requirements
- August 31, 2023 – DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- May 31, 2023 – DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- May 6, 2022 – Delta Watermaster Response to DWR Re: Exceedance of Southern Delta Agricultural Water Quality Objective
- May 3, 2022 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- April 25, 2022 - DWR and USBR Report of Exceedance of Habitat Protection Outflow (X2) Objective at Collinsville
- March 30, 2022 – DWR Notification Re: Exceedance of Habitat Protection Outflow (X2) Objective at Collinsville
- March 28, 2022 - Letter from USBR submitting the 2021 Annual Report for the Consolidated and Conformed Place of Use Habitat Management Plan
- March 15, 2022 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for February 2022
- March 7, 2022 - Letter from the Executive Director to USBR Re: Water Rights Decision 1641 San Joaquin and Stanislaus River Flows.
- February 24, 2022 - DWR and Reclamation Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- February 4, 2022 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- December 27, 2021 – DWR and USBR Report Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- December 6, 2021 - DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- October 20, 2021 - DWR and Reclamation Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- October 13, 2021 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for September 2021
- August 6, 2021 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for July 2021
- July 23, 2021 – Letter from DWR and USBR Re: Report of Exceedances of Western Delta Agricultural Objectives at Three Mile Slough and Jersey Point
- July 7, 2021 - Email from DWR Re: Notification of Exceedance of the Western Delta Agricultural Water Quality Objective at San Joaquin River at Jersey Point
- June 11, 2021 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for May 2021
- May 24, 2021 – DWR Report Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- May 17, 2021 – DWR and USBR Report of Exceedance of Habitat Protection Outflow (X2) Objective at Collinsville
- May 3, 2021 – Email from USBR to the State Water Board Executive Director Re: Delta Cross Channel Gate testing
- April 30, 2021 – Letter from the Executive Director to DWR and USBR Re: Compliance with Water Right Requirements in the Bay-Delta Watershed
- April 26, 2021 - Letter from DWR to SWRCB reporting potential exceedance of South Delta Water Quality Agricultural Objectives
- April 25, 2021 – Letter from the California Sportfishing Protection Alliance and California Water Impact Network to the State Water Board Executive Director urging immediate enforcement of Decision 1641 Spring Pulse Flow
- April 20, 2021 – Email from USBR Operations Manager to the State Water Board Executive Director advising of likely shortages in meeting April Delta outflow requirements pursuant to Decision 1641 as early as April 17, 2021
- April 8, 2021 – Email from USBR submitting the Stanislaus River Stepped Release Plan for Spring Pulse Flows
- April 7, 2021 – Letter from the Executive Director to USBR Re: Decision 1641 San Joaquin River Flows Compliance
- March 8, 2021 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for February 2021
- March 5, 2021 – DWR and USBR Report Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- February 12, 2021 – USBR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- January 27, 2021 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- November 30, 2020 – DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- November 9, 2020 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for October 2020
- October 23, 2020 – Email from USBR Operations Manager to State Water Board Assistant Deputy Director Re: Decision 1641 San Joaquin River Fall Pulse Flows
- September 14, 2020 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- September 3, 2020 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for August 2020
- August 31, 2020 – DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- August 27, 2020 – Letter from Delta Watermaster to DWR Re: Exceedances of Southern Delta Agricultural Water Quality Objective
- August 7, 2020 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for July 2020
- July 3, 2020 – DWR Report of Salinity Conditions at South Delta Monitoring Stations for June 2020
- May 28, 2020 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- April 21, 2020 – Letter from USBR to the Executive Director Re: Decision 1641 San Joaquin River Flow Requirements and Export Limits
- April 3, 2020 – Letter from the Executive Director to USBR Re: Decision 1641 San Joaquin River Flow Requirements and Export Limits
- April 3, 2020 – Email from USBR submitting the Stanislaus River Stepped Release Plan for Spring Pulse Flows
- March 12, 2020 – USBR Notification Re: Compliance with the San Joaquin River Flow Requirements in February
- March 13, 2019 – DWR and USBR Re: Estimating Methodology for Compliance with Habitat Protection Outflow (X2) Objective at Port Chicago
- March 13, 2019 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for February, 2019
- February 8, 2019 - DWR Notification Re: Port Chicago/64km Update
- January 16, 2019 - DWR and USBR Re: Report of Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- January 3, 2019 - DWR Re: Notification of Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- August 15, 2018 - DWR Notification Re: Exceedance of Average Electrical Conductivity at Brant Bridge
- July 24, 2018 – DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- April 12, 2018 – Letter from U.S. Bureau of Reclamation to State Water Board Deputy Director regarding New Melones Reservoir Operations
- April 3, 2018 – Letter from State Water Board Deputy Director to U.S. Bureau of Reclamation regarding compliance with the San Joaquin River flow requirement for the month of February
- March 12, 2018 - DWR and USBR Report of Exceedance of Habitat Protection Outflow (X2) Objective at Chipps Island
- March 8, 2018 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for February, 2018
- March 5, 2018 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- February 20, 2018 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for January, 2018
- January 11, 2018 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for December, 2017
- November 30, 2017 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order 2010-0002
- October 13, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for September, 2017
- September 7, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for August, 2017
- July 19, 2017 - Letter from the South Delta Water Agency regarding the Revised Compliance Plan submitted by DWR and USBR
- June 19, 2017 - Letter from DWR and USBR submitting a Revised Compliance Plan pursuant to Cease and Desist Order WR 2010-0002
- June 6, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for May, 2017
- June 2, 2017 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- April 11, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for March, 2017
- March 3, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for February, 2017
- February 28, 2017 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- January 12, 2017 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for December, 2016
- December 20, 2016 - Letter from the Delta Watermaster to DWR and USBR Re: Notice for Submission of Interior Southern Delta Salinity Objectives Compliance Plan and Schedule Pursuant to Cease and Desist Order WR 2010-0002
- December 12, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for November, 2016
- November 9, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for October, 2016
- October 18, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for September, 2016
- September 15, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for August, 2016
- August 31, 2016 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- August 17, 2016 - DWR and USBR Notification Re: Notification of Exceedance of Average Electrical Conductivity at Jersey Point
- August 17, 2016 - DWR and USBR Notification Re: Notification of Exceedance of Average Electrical Conductivity at San Joaquin River at Brandt Bridge, and Old River near Middle River
- August 11, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for July, 2016
- July 19, 2016 - DWR Re: Notification of Exceedance of Average Electrical Conductivity at Brandt Bridge
- July 18, 2016 - DWR Re: Notification of Exceedance of Average Electrical Conductivity at Jersey Point
- July 15, 2016 - DWR and USBR Notification Re: Potential Exceedance of Average Electrical Conductivity at all three interior south Delta compliance locations (San Joaquin River at Brandt Bridge, Old River near Middle River, and Old River at Tracy Road Bridge)
- July 8, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for June, 2016
- June 24, 2016 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- June 9, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for May, 2016
- May 31, 2016 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- May 24, 2016 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- May 23, 2016 - Complaint filed against USBR by The Bay Institute (TBI)
- TBI Complaint spreadsheet attachments:
- May 5, 2016 - USBR Notification of Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- April 28, 2016 - DWR and USBR Notification Re: Potential Exceedance of Average Electrical Conductivity at one or more of the three interior south Delta compliance locations (San Joaquin River at Brandt Bridge, Old River near Middle River, and Old River at Tracy Road Bridge)
- April 14, 2016 - USBR Report of Exceedance of Spring Base Flow Standard at Vernalis in February
- March 30, 2016 - USBR and DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- March 15, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for February, 2016
- March 2, 2016 - DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River at Tracy Road Bridge
- February 29, 2016 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- February 19, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for January, 2016
- January 14, 2016 - DWR Report of Salinity Conditions at South Delta Monitoring Stations
- December 28, 2015 - DWR and USBR Notification Re: Shortfall of Modified Rio Vista Flow Objective
- December 2, 2015 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for November, 2015
- November 30, 2015 - DWR Quarterly Status Report Pursuant to Condition 11 of State Water Board Order WR 2010-0002
- November 30, 2015 - USBR Notification Re: Exceedance of TUCP Modified Rio Vista Standard
- August 11, 2015 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Three Mile Slough and Jersey Point
- August 11, 2015 - DWR Report of Salinity Conditions at South Delta Monitoring Stations for July, 2015
- August 7, 2015 - USBR Notification to USFWS Re: West False River Emergency Drought Barrier
- August 7, 2015 - USBR Notification to NMFS Re: West False River Emergency Drought Barrier
- July 20, 2015 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at San Joaquin River at Brandt Bridge
- July 13, 2015 - DWR Notification Re: Electrical Conductivity Exceedance at Jersey Point
- July 9, 2015 - DWR Notification Re: Electrical Conductivity Exceedance at Three Mile Slough
- June 23, 2015 - DWR Notification Re: Exceedance of Average Electrical Conductivity at Old River Near Middle River
- June 12, 2015 - DWR Notification Re: Exceedance of Average Electrical Conductivity at San Joaquin River at Brandt Bridge
- February 13, 2015 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at San Joaquin River at Brandt Bridge
- January 15, 2015 - State Water Board Executive Director Response to Request for Modification of Vernalis EC Objective
- January 9, 2015 - USBR Request for Modification of Vernalis Water Quality Objective for Electrical Conductivity
- May 29, 2013 - Letter from State Water Board to DWR and USBR Re: Response to May 24 Letter regarding D-1641 Water Year Classification and Actions to Conserve Cold Water Pool in Shasta Reservoir
- May 28, 2013 - U.S. Fish and Wildlife Service Support for Change in Water Year Classification
- May 24, 2013 - CA Department of Fish and Wildlife Support for Change in Water Year Classification
- May 24, 2013 - NOAA Fisheries/National Marine Fisheries Service Support for Change in Water Year Classification
- May 24, 2013 - Letter from DWR and USBR Re: SWRCB D-1641 Water Year Classification
- August 20, 2012 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- August 2, 2012 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Tracy Road Bridge
- May 29, 2012 - State Water Board Reply to May 15, 2012 Letter from DWR and USBR
- May 15, 2012 - DWR and USBR Reply to State Water Board Letter dated April 20, 2012
- April 20, 2012 - State Water Board Letter Re: Exceedances of South Delta Water Quality Objectives
- April 6, 2012 - Letter from South Delta Water Agency Re: Exceedance of South Delta Water Quality Objective
- April 2, 2012 - DWR and USBR Notification Re: Exceedance of Average Electrical Conductivity at Tracy Road Bridge