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.

  • 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