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

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
  • 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