Sacramento/Delta Update to Bay-Delta Plan
The State Water Board is currently considering updates to the Bay-Delta Plan focused on the Sacramento River and its tributaries, Delta eastside tributaries (including the Calaveras, Cosumnes, and Mokelumne Rivers), interior Delta flows, and Delta outflows, including consideration of proposed voluntary agreements.
Announcements
New Documents Available for Public Review and Comment
On December 12, 2025, the State Water Board released:
- Revised Draft Sacramento/Delta Updates to the Bay-Delta Plan
- A new Chapter 13 of the draft Staff Report for a limited recirculation
The State Water Board will receive comments on these documents as follows:
- Orally at a public hearing on January 28-30, 2026, beginning at 9:00 am each day
- In writing by February 2, 2026
See the Notice (Aviso en Español) for additional information, including how to participate in the public hearing and provide written comments. The notice also includes two attachments that summarize the documents that were released on December 12, 2025.
Key Documents
- Revised Draft Sacramento/Delta Updates to the Bay-Delta Plan (December 2025)
- Appendix A. Bay-Delta Monitoring and Evaluation Program (BDMEP)
- Appendix B.1. Voluntary Agreements Pathway Accounting Protocols: Flow Accounting
- Appendix B.2. Voluntary Agreements Pathway Accounting Protocols: Non-Flow Habitat Accounting
- Limited Recirculation of Draft Staff Report (December 2025)
- Revised Draft Sacramento/Delta Updates to Bay-Delta Plan (July 2025)
- Appendix A. Bay-Delta Monitoring and Evaluation Program (BDMEP)
- Appendix B.1. Voluntary Agreements Accounting Protocols: Flow Accounting
- Appendix B.2. Voluntary Agreements Accounting Protocols: Non-Flow Habitat Accounting
- Supplemental Modeling of 55 Percent of Unimpaired Flow with Water Supply Adjustments
- Draft Sacramento/Delta Updates to Bay-Delta Plan (October 2024)
- Draft Staff Report in Support of Sacramento/Delta Update (September 2023)
- Draft Scientific Basis Report Supplement in Support of Proposed Voluntary Agreements (January 2023)
- Framework for Sacramento/Delta Update (July 2018)
- Final Scientific Basis Report (October 2017)
Resources
- FAQ: Update and Implementation of the Bay-Delta Plan (July 2025)
- FAQ: Update and Implementation of the Bay-Delta Plan (October 2024)
- Video: Overview of Sacramento/Delta Update to Bay-Delta Plan and Draft Staff Report (October 2023)
- FAQ: Draft Staff Report in Support of Sacramento/Delta Update (September 2023)
- FAQ: Draft Scientific Basis Report Supplement in Support of Proposed Voluntary Agreements (January 2023)
- Fact Sheet: Phase II Update (October 2017)
- Fact Sheet: Working Draft Scientific Basis Report (October 2016)
Prior Events and Actions
- September 16, 2025 – Rescinded Notice of Public Comment and Hearing on Revised Sacramento/Delta Updates to Bay-Delta Plan | Aviso de Rescindida
- August 22, 2025 – Second Revised Notice of Public Comment and Hearing on Revised Draft Sacramento/Delta Updates to Bay-Delta Plan | Segundo Aviso Revisado en Español
- August 15, 2025 – Revised Notice of Public Comment and Hearing on Revised Draft Sacramento/Delta Updates to Bay-Delta Plan | Aviso Revisado en Español
- July 24, 2025 – Notice of Public Comment and Hearing on Revised Draft Sacramento/Delta Updates to Bay-Delta Plan | Aviso en Español
- March 4, 2025 – Working Meeting #11 (Tribal Provisions)
- February 27, 2025 – Working Meeting #10 (Voluntary Agreement Flow Commitments and Accounting)
- February 20, 2025 – Working Meeting #9 (Monitoring and Evaluation for Voluntary Agreement Provisions)
- February 20, 2025 – Questions to Guide Working Meetings
- February 19, 2025 – Working Meeting #8 (Voluntary Agreement Habitat Commitments and Accounting Provisions)
- February 13, 2025 – Working Meeting #7 (Provisions for Continuation, Modification, or Termination of Voluntary Agreements)
- February 5, 2025 – Working Meeting #6 (Monitoring and Evaluation for Regulatory Provisions)
- February 4, 2025 – Working Meeting #5 (Methodology to Determine Water Unavailability and Implement Bay-Delta Plan)
- January 30, 2025 – Working Meeting #4 (Inflow-Based Delta Outflow Objective and Program of Implementation)
- January 29, 2025 – Working Meeting #3 (Cold Water Habitat Objective and Program of Implementation)
- January 28, 2025 – Working Meeting #2 (Inflow Objective and Program of Implementation)
- January 23, 2025 – Workshop on Draft Sacramento/Delta Updates to the Bay-Delta Water Quality Control Plan (Day 5)
- January 16, 2025 – Working Meeting #1 (Purpose and Overall Approach)
- January 3, 2025 – Opportunity to Participate in Working Meetings on Draft Sacramento/Delta Updates to Bay-Delta Plan
- December 12, 2024 – Workshop on Draft Sacramento/Delta Updates to the Bay-Delta Water Quality Control Plan (Day 4)
- December 12, 2024 - Third Revised Notice of Public Comment and Workshop on Draft Sacramento/Delta Updates to Bay-Delta Plan
- December 3, 2024 – Workshop on Draft Sacramento/Delta Updates to the Bay-Delta Water Quality Control Plan (Day 3)
- November 22, 2024 – Workshop on Draft Sacramento/Delta Updates to the Bay-Delta Water Quality Control Plan (Day 2)
- November 20, 2024 – Workshop on Draft Sacramento/Delta Updates to the Bay-Delta Water Quality Control Plan (Day 1)
- November 6, 2024 – Second Revised Notice of Public Comment and Workshop on Draft Sacramento/Delta Updates to Bay-Delta Plan | Segundo Aviso Revisado
- November 1, 2024 – Revised Notice of Public Comment and Workshop on Draft Sacramento/Delta Updates to Bay-Delta Plan
- October 25, 2024 – Notice of Public Comment and Workshop on Draft Sacramento/Delta Updates to Bay-Delta Plan
- April 24-26, 2024 – Board Workshop on Proposed VAs
- March 8, 2024 – Notice of Board Workshop on Proposed Voluntary Agreements Related to Sacramento/Delta Update to Bay-Delta Plan
- December 11, 2023 – Public Hearing on Draft Staff Report (Day 3)
- December 1, 2023 – Public Hearing on Draft Staff Report (Day 2)
- November 17, 2023 – Public Hearing on Draft Staff Report (Day 1)
- November 14, 2023 – Revised Notice of Availability and Opportunity for Public Comment, Hearing, and Staff Workshops on Draft Staff Report
- November 2, 2023 – Staff Workshop on Modeling Used in Draft Staff Report
- October 19, 2023 – Staff Workshop on Overview of Draft Staff Report
- September 28, 2023 – Notice of Availability and Opportunity for Public Comment, Hearing, and Staff Workshops on Draft Staff Report
- June 7, 2023 – Board Meeting Informational Item on Addition of Tribal Beneficial Uses to Bay-Delta Plan
- January 5, 2023 – Notice of Draft Scientific Basis Report Supplement
- October 4, 2017 – Response to 2017 Peer Review Comments on the Scientific Basis Report in Support of New and Modified Requirements in Support of the Phase II Update of the Bay-Delta Plan
- October 4, 2017 – Notice Regarding Information and Future Updates of the Bay-Delta Plan
- October 4, 2017 – Notice of Opportunity to Provide Input to Inform the Development of the Program of Implementation for the Update of the Bay-Delta Plan
- February 23, 2017 – Delta Independent Science Board Review of Working Draft Scientific Basis Report
- December 22, 2016 – Letter from Board Chair Felicia Marcus to Governor Brown
- December 7, 2016 – Workshop on Working Draft Scientific Basis Report
- October 19, 2016 – Notice of Opportunity for Public Comment and Notice of Public Workshop on Working Draft Scientific Basis Report
- October 5, 2016 – Delta Science Program Independent Peer Review Report on Estimating Net Delta Outflow
- March 2016 – Department of Water Resources Report on Estimating Net Delta Outflow
- July 2014 – Delta Science Program Panel Summary Report for Workshop on Interior Delta Flows and Related Stressors
- May 5, 2014 – Delta Science Program Panel Summary Report for Workshop on Delta Outflows and Related Stressors
- April 9, 2013 – Board Meeting Informational Item on Next Steps for Comprehensive Review
- September, October, and November 2012 – Public Workshops
- June 19, 2012 – Board Meeting Informational Item on Organization of Workshops
- January 24, 2012 – Supplemental Notice of Preparation
- February 13, 2009 – Notice of Preparation
- 2009 Periodic Review of the 2006 Water Quality Control Plan
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Contact Us
Quick Links
Public Comments
To request a copy of written public comments or other documents related to the Sacramento/Delta updates to the Bay-Delta Plan, contact SacDeltaComments@waterboards.ca.gov.
