CA SB1121

Requires local jurisdictions to approve permits for onsite treated nonpotable water systems within 60 days if the application meets or exceeds state water quality standards for multifamily residential, commercial, and mixed-use buildings.

Applies to systems using graywater, rainwater, stormwater, or blackwater for nonpotable end uses including toilet flushing, clothes washing, irrigation, and dust suppression.

Amends existing Water Code Section 13558 to establish a mandatory permitting timeline, while maintaining local jurisdiction authority over design criteria, cross-connection controls, and enforcement procedures.

Permits must be approved within the 60-day timeframe only if the project demonstrates compliance with state board water quality standards for pathogen removal and monitoring requirements.