About Region 10's NPDES Permit Program
This page contains information about EPA's NPDES permit program in Region 10, which serves Alaska, Idaho, Oregon, and Washington and 271 federally recognized tribes.
EPA issues NPDES permits in Alaska for federally-owned facilities located in Denali National Park; facilities operating outside state waters (three miles offshore); facilities that have been issued Clean Water Act Section 301(h) waivers from secondary treatment standards; and all facilities on tribal lands. The Alaska Department of Environmental Conservation issues all other wastewater permits in Alaska.
- EPA-issued permits in Alaska
- For state-issued permits, visit Alaska Pollutant Discharge Elimination System (APDES) Program
EPA has transferred permitting authority to Idaho for wastewater discharges within Idaho's jurisdiction. Visit Idaho NPDES Program Authorization for more information.
EPA issues all permits on tribal lands in Idaho.
EPA issues all NPDES permits on tribal lands in Oregon. The Oregon Department of Environmental Quality (ODEQ) issues all other permits.
EPA issues NPDES permits for federally-owned facilities and all permits on tribal lands in Washington. The Washington Department of Ecology (Ecology) issues all other permits.
EPA issues all NPDES permits on tribal lands. See EPA-issued permits within each state listed above.
- Guidance on Major/Minor Designation for NPDES Facilities in Region 10
- Water Sampling and Testing for Formaldehyde at Northwest Fish Hatcheries
- Guidance on Water Quality Based Effluent Limits Set Below Analytical Detection/Quantitation Limits
- Advanced Wastewater Treatment to Achieve Low Concentration of Phosphorus (pdf) (April 2007)