California Stormwater-Municipalities regulations & environmental compliance analysis

California Stormwater-Municipalities: What you need to know

Governing Law and Regulations

Stormwater Enforcement Act of 1998, California Water Code (CWC) 13399.25 to 13399.43

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Municipalities: CWC 13383.5

Caltrans: CWC 13383.5(d)

Regulatory Agencies

California Regional Water Quality Control Boards (RWQCBs)

California Environmental Protection Agency (Cal/EPA) State Water Resources Control Board (SWRCB) Division of Water Quality Stormwater Section

California Department of Transportation (Caltrans)

U.S. Environmental Protection Agency (EPA) Region 9

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. California is authorized by the U.S. Environmental Protection Agency (EPA) to administer stormwater permits under the National Pollutant Discharge Elimination System (NPDES) permit program, including permits that cover discharges associated with municipal separate storm sewer systems (MS4s). The state generally follows the federal permitting regulations and has given authority to regional water boards to administer stormwater permits. See the national section STORMWATER - MUNICIPALITIES for more information on the federal requirements for municipal stormwater discharges.

California issues a statewide permit that regulates all discharges from California Department of Transportation (Caltrans) MS4s, maintenance facilities, and construction activities.

Administration and enforcement. SWRCB's Division of Water Quality is responsible for the administration and enforcement of the stormwater discharge permit regulations in California. Stormwater discharge general permits are implemented and enforced by the nine RWQCBs.

State Requirements


CWC 13383.5

California follows ...

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