SB 224: Department of Water Resources: water supply forecasting.

Official summary

Legislative Counsel’s Digest (official, as of the latest version). Written by nonpartisan legislative staff; reproduced verbatim.

Existing law requires the Department of Water Resources to gather and correlate information and data pertinent to an annual forecast of seasonal water crop. Existing law also requires the department to update every 5 years the plan for the orderly and coordinated control, protection, conservation, development, and use of the water resources of the state, which is known as “The California Water Plan.”

This bill would require the department, on or before January 1, 2027, to update its water supply forecasting models and procedures to address the effects of climate change and implement a formal policy and procedures for documenting the department’s operational plans and the department’s rationale for its operating procedures, including the department’s rationale for water releases from reservoirs. The bill would also require the department to establish, and publish on the department’s internet website, the specific criteria that it will employ to determine when its updated water supply forecasting model has demonstrated sufficient predictive capability to be ready for use in each of the watersheds. The bill would require the department, on or before January 1, 2028, and annually thereafter, to prepare and submit to the Legislature a report on its progress toward implementing the new forecasting model and to post the report on the department’s internet website. The bill would also require the department, on or before January 1, 2028, and annually thereafter, to prepare and submit to the Legislature a report that explains the rationale for the department’s operating procedures specific to the previous water year.

Sponsors

Sponsors by party (alphabetical): Democratic 1

“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.

Recent official actions

1. March 2, 2026Veto sustained.
2. March 2, 2026Stricken from file.
3. October 3, 2025In Senate. Consideration of Governor's veto pending.
4. October 3, 2025Vetoed by the Governor.
5. September 22, 2025Enrolled and presented to the Governor at 11 a.m.
6. September 11, 2025Assembly amendments concurred in. (Ayes 40. Noes 0. Page 2890.) Ordered to engrossing and enrolling.
7. September 9, 2025In Senate. Concurrence in Assembly amendments pending.
8. September 9, 2025Read third time. Passed. (Ayes 77. Noes 1. Page 3084.) Ordered to the Senate.
9. September 3, 2025Read second time. Ordered to third reading.
10. September 2, 2025Read second time and amended. Ordered to second reading.
11. August 29, 2025From committee: Do pass as amended. (Ayes 15. Noes 0.) (August 29).
12. August 20, 2025August 20 set for first hearing. Placed on APPR. suspense file.