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Contact EPA Pacific Southwest Water Division

Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

NPDES Wastewater & Stormwater Permits

NPDES Quick Finder
NPDES HomeCompliance & EnforcementState Programs NEPA ProjectsGuidance Permits and Public NoticesPretreatment Sewage Sludge (biosolids) Stormwater

NEPA Projects

The provisions of the National Environmental Policy Act (NEPA) apply to issuance of new source NPDES permits. EPA has determined that the following projects are new sources, as defined under the Clean Water Act.

Stormwater Municipal Separate Stormwater Sewer Systems (MS4) Program Audits

Completed Projects:







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