Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
NPDES Wastewater & Stormwater Permits
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The following States in Region 9 are authorized to implement the NPDES program.
- Department of Environmental Quality
- EPA's authorization of Arizona NPDES program (December 5, 2002)
- State Water Resources Control Board
- Regional Boards - Regional Boards issue NPDES permits for nine geographic areas of California.
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