CA SB966

State Water Resources Control Board must adopt regulations for risk-based water quality standards for onsite treatment and reuse of nonpotable water in multifamily residential, commercial, and mixed-use buildings by December 1, 2022.

Standards must address log reduction targets for pathogen removal, water quality monitoring, reporting requirements, public notification, and cross-connection controls for various water sources and nonpotable end uses.

Local jurisdictions electing to establish onsite treated nonpotable water programs must adopt ordinances incorporating state standards, establish design and permitting procedures, and provide annual reports to the state board.

Local jurisdictions must consult with water and sewer service providers before adopting programs and must avoid or mitigate any significant adverse impacts to existing systems, recycled water facilities, or receiving waters.

Onsite treated nonpotable water systems cannot be installed except under a local jurisdiction program complying with this bill; systems in operation before regulations take effect have two years to comply, with possible extensions up to five years.