From the State Water Resources Control Board:
The State Water Resources Control Board (State Water Board or Board) will consider adopting revisions to the Diversion Measurement and Reporting Regulation (regulation) on Tuesday, August 5, 2025. The initial regulation, adopted as an emergency regulation in 2016, requires anyone with a water right to divert over 10 acre-feet annually to measure the rate and volume of their diversions and submit measurement data to the Board. The proposed revisions clarify requirements, standardize measurement data reporting, require email addresses for reporting, and align reporting periods for groundwater reporting.
Document Availability
The draft regulation text, agenda item, draft resolution, and other supporting documents are available on the State Water Board’s website at: https://www.waterboards.ca.gov/waterrights/water_issues/programs/diversion_use/rulemaking.html
Comment Periods
On February 28, 2025, the State Water Board released draft proposed revisions to the regulation and solicited public input both orally at a public hearing on April 16, 2025 and in writing by April 23, 2025. The Board updated the proposed regulation text based on that feedback and solicited public input during a second written comment period from May 22 to June 6, 2025. Minor changes to the regulation text resulted in a third written comment period from June 16 to July 1, 2025.
Additional Resources
For more information regarding the rulemaking process for this regulation, visit the Water Measurement and Reporting Regulation Rulemaking webpage. Subscribe to the Water Measurement list on the State Water Board’s Email Lists webpage for further updates about the water measurement regulations. For information regarding the existing regulation, and resources on how to measure, visit the general Water Measurement webpage. If adopted, the regulation revisions will change how diverters must comply and currently posted guidance will be replaced with updated resources.
Language Translation Services
To request translation services, please contact the Office of Public Engagement, Equity, and Tribal Affairs at (916) 341-5254 as soon as possible.
Para solicitar servicios de traducción, comuníquese con la Oficina de Participación Pública, Equidad, y Asuntos Tribales al (916) 341-5254 lo antes posible.
Contact
If you have any questions regarding this notice or related efforts, you may send an email to DWR-Measurement@waterboards.ca.gov or leave a voicemail at the Water Measurement phone line at (916) 323-9393.
