San Francisco Bay/Sacramento – San Joaquin Delta Estuary (Bay-Delta) Watershed Efforts
Subscribe to our Email Lists
- Subscribe online to receive email
announcements, updates, and other information
on the Bay-Delta Program.
State Water Board Bay-Delta Program Links
The Bay-Delta Watershed includes the Sacramento and San Joaquin Rivers, the Delta where those rivers converge, Suisun Marsh, and the embayments upstream of the Golden Gate. The watershed of the Bay-Delta Estuary is a source of water supplies for much of the state. The water is used for municipal, industrial, agricultural, and environmental purposes. The watershed is a source of drinking water for two-thirds of the state's population and millions of acres of productive farmland. The waterways of the Bay-Delta Estuary and its tributaries also provide critical habitat for numerous threatened and endangered species and recreationally and commercially important species, as well as other public trust values.
The State Water Resources Control Board (State Water Board) is responsible for developing and modifying the Bay-Delta Water Quality Control Plan (Bay-Delta Plan) which establishes water quality control measures needed to provide reasonable protection of beneficial uses of water in the Bay-Delta Watershed. The State Water Board also implements the Bay-Delta Plan through water rights and other measures and otherwise administers water rights in the Bay-Delta Watershed. Information on these activities is posted at the links below:
Bay-Delta Planning and Implementation Efforts
The State Water Board is in the process of developing and implementing updates to the Bay-Delta Plan to protect beneficial uses in the Bay-Delta watershed. Phase I of this work involves updating San Joaquin River flow and southern Delta water quality requirements included in the Bay-Delta Plan. The proposed Phase II changes to the Bay-Delta Plan include: new inflow requirements for the Sacramento River, its tributaries, and eastside tributaries to the Delta (the Mokelumne, Calaveras and Cosumnes rivers); new and modified Delta outflow requirements; new requirements for cold water habitat; new and modified interior Delta flow requirements; recommendations for complementary ecosystem protection actions that others should take; and adaptive management, monitoring, evaluation, special study, and reporting provisions. Additional activities are planned to implement the Bay-Delta Plan updates.
Additional information concerning these processes is available at the links below:
- Bay-Delta Plan Update: San Joaquin River Flows and Southern Delta Water Quality (Phase I)
- Bay-Delta Plan Update: Delta Outflow, Sacramento River and Delta Tributary Inflow, Coldwater Habitat and Interior Delta Flows (Phase II)
- Frequently Asked Questions on the Bay Delta Process - September 15, 2016
- Informational Items Related to Bay-Delta Planning
The current timelines for Phases I and II are as follows:Phase I:
- September 2016 - Draft Revised Substitute Environmental Document (SED) in support of potential changes to the Bay-Delta Plan released for public review (comments were due by March 17, 2017)
- Spring 2018 - Final SED (including responses to public comments) and proposed changes to the Bay-Delta Plan released for public review
- Mid-2018 - State Water Board meeting to consider adoption of changes to the Bay-Delta Plan and certification of Final SED
- October 2017 - Final Scientific Basis Report identifying science supporting potential changes to the Bay-Delta Plan posted
- Spring 2018 - Draft SED/Staff Report and draft proposed changes to the Bay-Delta Plan released for public comment
- Fall 2018 - Final SED (including responses to public comments) and proposed changes to the Bay-Delta Plan released for public review
- Late 2018 - State Water Board meeting to consider adoption of changes to the Bay-Delta Plan and certification of Final SED/Staff Report
On August 26, 2015, the California Department of Water Resources (DWR) and U.S. Bureau of Reclamation (Reclamation) filed a change petition to add points of diversion on the lower Sacramento River as part of the California WaterFix project. A Board hearing on the petition commenced on July 26, 2016 and is expected to continue through 2017. In addition, DWR and Reclamation filed an application for a water quality certification pursuant to Section 401 of the Clean Water Act that will be considered administratively in a separate but parallel process.
Information on past Bay-Delta drought activities is provided at the following links:
- U.S. Bureau of Reclamation's New Melones Project Temporary Urgency Change Petitions
- State Water Project and Central Valley Project Temporary Urgency Change Petition
- State Water Board Drought Year Water Actions
Information on some of the Bay-Delta compliance issues is located at the following links:
- Standard Term 91 Water Availability (2018, 2017, 2016)
- Order 90-5 Sacramento River Temperature
- Decision 1641 Compliance
- Joint Points of Diversion