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Board adopts updated measurement and reporting rules for diversions, readies new CalWaters reporting requirements
Summary
The State Water Resources Control Board voted Aug. 5 to adopt updated regulations revising the diversion measurement and reporting rules (SB 88), aligning format and timing with the new CalWaters system and adding phased compliance dates and alternative compliance options for diverters.
The State Water Resources Control Board on Aug. 5 approved a package of revisions to California’s diversion measurement and reporting regulations (commonly called SB 88 rules), directing staff to submit the rulemaking package to the Office of Administrative Law with an anticipated effective date of Oct. 1, 2025.
Division of Water Rights staff told the board the update makes measurement data more standardized and usable, clarifies who must measure and how data should be submitted, and aligns reporting with the new statewide CalWaters platform. Staff said the revised text restructures the regulation for clarity, refines definitions, replaces the term…
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