Announcements
2025
- Advisory for Water Use Reporters in the Legal Delta
If you are reporting water use in the Legal Delta, please note that you will not be able to begin reporting in CalWATRS, until mid-November 2025.
The State Water Board is planning a series of public events to help users navigate CalWATRS. Upcoming events will be posted on the CalWATRS webpage as they are scheduled.
If you have questions or would like the CalWATRS team to attend an event in your area, please email deltawatermaster@waterboards.ca.gov.
For the latest updates, visit the CalWATRS webpage.
- 2025-09-08 MSS Report Response Letter
- Update for 2024 In-Delta Water Rights Reporting
Water Year 2024 reports and are now past due. If you report through the DeltaACP.com platform, please note the extended filing deadline was April 1, 2025. For questions regarding this update, contact the Office of the Delta Watermaster, deltawatermaster@waterboards.ca.gov.
2023
- State Water Board initiates public planning process for Bay-Delta Plan updates (9/28/2023)
- In a statewide first, California is using satellite-based evapotranspiration data for water use reporting in the Delta (6/27/2023)
- Delta Watermaster Jay Ziegler's Report to the State Water Board (6/21/2023)
- Report on the Delta Drought Response Pilot Program for Water Year 2022 (3/28/2023)
- March 16, 2023 Delta Alternative Compliance Plan Workshop Recording (3/16/2023)
- State Water Board selects Jay Ziegler as the New Delta Watermaster (3/1/2023)
2022
- Report of Investigation into Complaint Alleging Unauthorized Water Diversion in the Legal Delta (11/28/2022)
- Public Comments on Draft Report of Investigation into Complaint Alleging Unauthorized Water Diversion in the Legal Delta (11/28/2022)
- Delta Conservancy announces Delta Drought Response Pilot Program for Water Year 2023 (10/3/2022)
- State Water Board Adopts Regulations Modifying Water Right Ownership Notice Requirements and Reporting Dates (9/20/2022)
- Emergency Curtailment and Reporting Regulations Re-adopted in the Delta (7/21/2022)
- The Public Policy Institute of California published its Policy Brief: “Tracking Where Water Goes in a Changing Sacramento-San Joaquin Delta.” (5/2022)
- Order Denying Reconsideration of the Adoption of the August 2021 Emergency Curtailment and Reporting Regulation for the Sacramento-San Joaquin Delta Watershed (5/9/2022)
Subscribe to our E-mail Lists
Contacts
Tel: (916) 319-8264
E-mail: deltawatermaster@waterboards.ca.gov
