Washington NPDES Permits
Click on the facility/permit name to view permit documents.
| Location | Facility or Permit Name | Permit Number | Effective Date | Expiration Date |
|---|---|---|---|---|
| Offshore Coastal Waters | General Permit for Offshore Seafood Processors in Federal Waters Off the Coast of Washington and Oregon | WAG520000 | 2019-05-01 | 2024-04-30 |
| Bridgeport | Chief Joseph Dam | WA0026891 | 2023-12-01 | 2028-11-30 |
| Coulee Dam | Town of Coulee Dam Wastewater Treatment Plant | WA0020281 | 2017-12-01 | 2022-11-30 |
| Fort Lewis | Joint Base Lewis-McChord (JBLM) MS4 (Stormwater) | WAS026638 | 2013-12-25 | 2018-09-30 |
| Federal and Tribal Lands in Washington | General Permit for Federal Aquaculture Facilities and Aquaculture Facilities in Indian Country in Washington | WAG130000 | 2024-03-01 | 2029-02-28 |
| Mt. Rainier National Park | Paradise Wastewater Treatment Plant | WA0025569 | 2017-02-01 | 2022-01-31 |
| Leavenworth | Leavenworth National Fish Hatchery | WA0001902 | 2018-01-01 | 2022-12-31 |
| Grand Coulee | Grand Coulee Dam Wastewater Treatment Plant | WA0024163 | 2014-08-01 | 2019-07-31 |
| Grand Coulee | Grand Coulee Dam | WA0026867 | 2023-12-01 | 2028-11-30 |
| Harrah (Yakama Reservation) | Town of Harrah Wastewater Treatment Plant | WA0022705 | 2012-10-01 | 2017-09-30 |
| Fort Lewis | Joint Base Lewis-McChord (JBLM) Solo Point Wastewater Treatment Plant | WA0021954 | 2012-04-01 | 2017-04-01 |
| Suquamish (Port Madison Reservation) | Suquamish Wastewater Treatment Plant | WA0023256 | 2008-06-01 | 2013-05-31 |
| Ferndale (Lummi Reservation) | Lummi Sandy Point Wastewater Treatment Plant | WA0025658 | 2025-01-01 | 2029-12-31 |
| Bellingham (Lummi Reservation) | Lummi Gooseberry Point Wastewater Treatment Plant | WA0025666 | 2025-01-01 | 2029-12-31 |
| Bellingham (Lummi Reservation) | Lummi Kwina Road Membrane Bioreactor (MBR) Wastewater Treatment Plant | WA0026727 | 2023-01-01 | 12-31-2027 |
| Neah Bay (Makah Reservation) | Makah Wastewater Treatment Plant | WA0023213 | 2016-07-01 | 2021-06-30 |
| Oak Harbor | Naval Air Station Whidbey Island Ault Field Wastewater Treatment Plant | WA0003468 | 2011-03-01 | 2016-02-28 |
| Oak Harbor | Naval Air Station Whidbey Island MS4 (Stormwater) | WAS026611 | 2021-02-01 | 2026-01-31 |
| Rufus Woods Lake (Colville Reservation) | Net Pen Aquaculture Facilities Discharging to Rufus Woods Lake (Pacific Aquaculture Sites #1-3, and Faith Frontier Ministries Chief Joseph Fish Farm) | WA0026336; WA0026328; WA0026719; WA0026379 |
2020-05-01 | 2025-04-30 |
| Bremerton | Puget Sound Naval Shipyard | WA0002062 | 1994-04-01 | 1999-04-01 |
| Puyallup (Puyallup Reservation) | Puyallup Wastewater Treatment Plant | WA0037168 | 2014-12-01 | 2019-11-30 |
| Queets(Quinault Reservation) | Queets Village Wastewater Treatment Plant | WA0023442 | 2021-11-01 | 2026-10-31 |
| Moclips (Quinault Reservation) | Moclips River Estates Wastewater Treatment Plant | WA0026603 | 2017-12-01 | 2022-11-30 |
| Anacortes (Swinomish Reservation) | Swinomish North End Wastewater Treatment Plant | WA0025062 | 2012-07-01 | 2017-06-30 |
| Anacortes (Swinomish Reservation) | Swinomish Shelter Bay Wastewater Treatment Plant | WA0024422 | 2012-07-01 | 2017-06-30 |
| Taholah (Quinault Reservation) | Tahola Village Wastewater Treatment Plant | WA0023434 | 2021-08-01 | 2026-07-31 |
| Toppenish (Yakama Reservation) | Toppenish Wastewater Treatment Plant | WA0026123 | 2013-07-01 | 2018-06-30 |
| Tulalip Reservation | Tulalip Tribes of Washington Wastewater Treatment Plant | WA0024805 | 2025-01-01 | 2029-12-31 |
| Oso | Naval Radio Station (Transmitter (T)) Jim Creek | WA0026573 | 2015-06-01 | 2020-05-30 |
| Bangor | Naval Base Bangor | WA0025577 | 2024-01-01 | 2028-12-31 |
| Wapato (Yakama Reservation) | Wapato Wastewater Treatment Plant | WA0050229 | 2023-10-01 | 2028-09-30 |
| Toppenish (Yakama Reservation) | Washington Beef | WA0050202 | 2010-02-01 | 2015-01-31 |
| Toppenish (Yakama Reservation) | Legends Casino Wastewater Treatment Plant | WA0026743 | 2013-11-01 | 2018-10-31 |
| Wellpinit (Spokane Reservation) | Dawn Mining Company Midnite Mine | WA0026841 | 2019-01-01 | 2023-12-31 |
| Wellpinit (Spokane Reservation) | Wellpinit Wastewater Treatment Plant | WA0025704 | 2019-04-01 | 2024-03-31 |
| Puget Sound | General Permit Tribal Enhancement and Federal Research Marine Net Pen Facilities within Puget Sound | WAG132000 | 2022-05-20 | 2027-05-19 |
| Oak Harbor | Naval Air Station Whidbey Island Seaplane Base Lagoon Wastewater Treatment Plant | WA0026760 | 2018-12-27 | 2023-12-26 |
| Manchester | Naval Fleet Logistics Center Puget Sound | WA0002780 | 2021-02-01 | 2026-01-31 |
| Everett | Naval Station Everett MS4 (Stormwater) | WAS026620 | 2021-02-01 | 2026-01-31 |
| Bremerton | Naval Base Kitsap MS4 (Stormwater) | WAS026646 | 2021-02-01 | 2026-01-31 |
| Lower Columbia River | Federal Hydroelectric Projects in the Lower Columbia River (Bonneville Project, The Dalles Lock and Dam, John Day Project, McNary Lock and Dam) | WA0026778; WA0026701; WA0026832; WA0026824 |
2023-07-01 | 2028-06-30 |
| Lower Snake River | Federal Hydroelectric Projects in the Lower Snake River (Ice Harbor Lock and Dam, Lower Monumental Lock and Dam, Little Goose Lock and Dam, Lower Granite Lock and Dam) | WA0026816; WA0026808; WA0026786; WA0026794 |
2022-04-01 | 2027-03-31 |
| Puyallup Reservation | Pierce County MS4 (Stormwater) | WAS026875 | Draft | Draft |
| Puyallup Reservation | City of Tacoma MS4 (Stormwater) | WAS026689 | Draft | Draft |
| Puyallup Reservation | Washington Department of Transportation (WSDOT) MS4 (Stormwater) | WAS026743 | Draft | Draft |
| Harstine Island (Squaxin Island Reservation) | Salish Seafoods | WA0037320 | 2022-07-01 | 2027-06-30 |
| Yakima | WA0021962 | 2022-01-01 | 2026-12-31 | |
| Port Hadlock | Naval Magazine Indian Island (NAVMAG) | WA0021997 | 2023-10-01 | 2028-09-30 |