California

    California's water regulatory framework is among the most complex in the nation, reflecting the state's unique water challenges and large population.

    Drinking Water Utilities

    2,387

    Wastewater Utilities

    999

    Key Compliance Drivers

    PFAS; LCRR; climate resilience; flooding; drought

    Lead and copper rule revisions, PFAS monitoring requirements, and drought resilience mandates are driving significant infrastructure investment. The state's aggressive water conservation targets and recycled water goals create opportunities for treatment technology vendors.

    Vendor Implications

    One of the most regulation-driven markets in the U.S. Buying cycles are influenced by state mandates and regional boards. Early engagement before funding applications is critical.

    Drinking Water Primacy Agency

    State Water Resources Control Board (DDW)

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    Wastewater / NPDES Agency

    State Water Resources Control Board

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    SRF / Funding Authority

    California SRF

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    Public Utility Commission

    California Public Utilities Commission

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    Regulates investor-owned utilities; municipal utilities self-govern rates.

    Municipal Oversight

    Municipal utilities operate independently under local control.

    Available Funding Programs

    • •Clean Water SRF
    • •Drinking Water SRF
    • •IRWM Grants