Water Measurement and Reporting Regulation Rulemaking
The Water Measurement and Reporting regulation is in Title 23 of the California Code of Regulations, Sections 931-938.
Current Rulemaking
Following extensive outreach and compliance assistance efforts in 2023 and 2024, the State Water Board is proposing changes to Title 23 of the California Code of Regulations, Chapters 2 (Appropriation of Water), 2.7 (Water Diversion and Use Reports) and 2.8 (Measuring and Monitoring). The proposed revisions clarify the regulation text and align data reporting requirements with water rights data modernization efforts. The proposed revisions would also require reporters to have an email address on file with the Board and will align the annual reporting period for groundwater recordations with the water year.
August Board Adoption Meeting
The Board will consider adopting the proposed revisions to the Diversion Measurement and Reporting Regulation (regulation) on Tuesday, August 5, 2025. The draft regulation text, draft resolution, agenda item, and CEQA notice of exemption documents are linked below for public review. The Board will consider adopting the regulation and resolution at the August 5, 2025 Board Meeting.
Regulatory and Supporting Documents
- July 2025 – August Board Adoption Meeting Materials
- Agenda Item
- Draft Resolution
- Final Proposed Text for Chapters 2 and 2.7
- Final Proposed Text for Chapter 2.8
- CEQA Notice of Exemption
- Summary of Proposed Changes – July Update
- June 2025 – Second Additional 15-Day Written Comment Period
- Notice of Second Additional 15-Day Written Comment Period
- Updated Proposed Text for Chapters 2 and 2.7 – Corrected Formatting
- Updated Proposed Text for Chapter 2.8 v3
- May 2025 – Additional 15-Day Written Comment Period
- Notice of Additional 15-Day Written Comment Period
- Initial Statement of Reasons Addendum
- Updated Proposed Text for Chapters 2 and 2.7
- Updated Proposed Text for Chapter 2.8 (red-lined | clean copy)
- Additional Reference Document for Economic Impact Assessment
- April 2025 – Water Measurement and Reporting Revisions Administrative Procedure Act Hearing
- February 2025 – Initial Rulemaking Package Submitted to Office of Administrative Law (OAL)
- Notice of Proposed Action
- Published Notice of Proposed Action in the California Regulatory Notice Register
- Initial Statement of Reasons
- Proposed Text for Chapters 2 and 2.7 (red-lined)
- Proposed Text for Chapter 2.8. Due to the extensive nature of the edits to Chapter 2.8, only non-redlined versions of the original and proposed text are available for download. A red-lined version showing the proposed changes to the original text is available upon request.
- Preliminary Standard Form 399 and Attachment
- Public Participation Guide (English | Spanish)
- Tribal Comment Period Outreach Letter
- Summary of Proposed Changes
Pre-Rulemaking Information and Outreach
On November 4, 2024, the State Water Resources Control Board held a staff workshop to present information and solicit public input on draft revisions to California Code of Regulations, Title 23, Chapters 2 (Appropriation of Water), 2.7 (Water Diversion and Use) and 2.8 (Measuring and Monitoring). The workshop was followed by a 4-week written public comment period.
Draft Proposed Regulation Text and Public Workshop
- December 2, 2024 – Written Comments Submission Deadline on the Proposed Changes to the Water Measurement and Reporting Regulation
- To request a copy of written public comments submitted in response to the November 4, 2024 Draft Proposed Regulation Text, please email DWR-Measurement@Waterboards.ca.gov.
- November 13, 2024 – Staff Workshop on Proposed Changes to the Water Measurement and Reporting Regulation
- November 4, 2024 – Proposed Changes to the Water Measurement and Reporting Regulation
- Draft Proposed Regulation Text
- Notice of 11/13/2024 Staff Workshop and Opportunity for Public Input on Proposed Changes to the Water Measurement and Reporting Regulation
- Aviso del 11/13/2024 Taller del Personal y Oportunidad de Opinión Pública Sobre los Cambios Propuestos en el Reglamento de Medición e Información Sobre el Agua
Past Emergency Rulemaking and Outreach (2015-2019)
Senate Bill 88 (SB 88) was signed by Governor Edmund G. Brown Jr. on June 24, 2015, and codified in Division 2 of the California Water Code, Sections 1840-1841.5. On January 19, 2016, the State Water Board adopted a Resolution to adopt an Emergency Regulation for Measuring and Reporting Water Diversions. The regulation was submitted to the Office of Administrative Law (OAL) for review on March 10, 2016, and approved on March 21, 2016.
Outreach Events
- January 18, 2019 – Measurement and Reporting Workshop
- August 22, 2016 – Measurement and Reporting Fair
- April 6, 2016 – Fact Sheet: Emergency Regulation for Measuring and Reporting on the Diversion of Water
Rulemaking
- March 21, 2016 – Approved Text of Water Measurement and Reporting Regulation
- February 19, 2016 – Regulation Package Submitted to OAL
- January 19, 2016 – Board Meeting
- Proposed Regulations Presented to the Board (draft)
- State Water Resources Control Board Resolution No. 2016-0005 (includes the adopted regulation text)
- December 17, 2015 – Board Workshop
- November 2-12, 2015 – Public Meetings
- June 2015 – Text of Senate Bill 88
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Contact
For questions regarding the regulation please contact us at:
Email: DWR-Measurement@waterboards.ca.gov
Phone: (916) 323-9393
