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State Water Board adopts statewide on-site nonpotable reuse regulations to implement SB 966
Summary
The board adopted risk‑based on‑site nonpotable reuse regulations under SB 966, instructing local jurisdictions to adopt corresponding local ordinances; staff said the rules are focused on building‑scale systems and excluded rainwater/graywater systems covered by building standards.
The State Water Resources Control Board on Nov. 19 voted to adopt statewide regulations for on‑site treatment and reuse of nonpotable water required by Senate Bill 966.
Shirley Rosalella, the technical lead, said the rules are risk‑based and were developed with an expert panel convened by the National Water Research Institute to set pathogen log reduction targets for multiple source waters and end uses. "These regulations are risk based as mandated by the senate bill and are focused on protection of public health," she said.
Staff described a yearlong rulemaking process that…
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