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State Water Board adopts clarified diversion measurement rules, delays some implementation to 2026–27
Summary
The State Water Resources Control Board adopted revised diversion measurement and reporting regulations (chapter 2.8, “SB 88” updates) on Dec. 2, 2025, after Office of Administrative Law feedback prompted clarifying edits. Most substantive measurement changes take effect Oct. 2026 with phased implementation through Jan. 2028.
The State Water Resources Control Board on Dec. 2 adopted clarifying revisions to California’s diversion measurement and reporting regulations (commonly discussed under SB 88), after staff withdrew and revised chapter 2.8 following feedback from the Office of Administrative Law.
Board staff said the changes mostly clarify language and procedures — for example, how deputy directors approve alternate websites for posting large‑diversion data and how notice and public comment would occur for threshold adjustments. Staff and presenters Lindsay Kamire and Sierra Kennison said the edits do not create new substantive obligations;…
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