Washington NPDES Permits
In Washington, EPA issues NPDES permits for federally-owned facilities and permits on tribal lands (see table below). EPA has delegated authority to issue other NPDES permits to the Washington Department of Ecology.
For state-issued permits, visit Washington Dept. of Ecology Water Quality Permits Exit
Related pages:
- About Region 10's NPDES Permit Program
- Region 10 Stormwater Program
- Region 10 Industrial Pretreatment Program
Click on the facility/permit name to view the permit and supporting documents.
| Location | Facility or Permit Name | Permit Number | Permit Status | Effective Date | Expiration Date |
|---|---|---|---|---|---|
| Offshore Coastal Waters | General Permit for Offshore Seafood Processors in Federal Waters Off the Coast of Washington and Oregon | WAG520000 | Final | 2019-05-01 | 2024-04-30 |
| Coulee Dam | Town of Coulee Dam Wastewater Treatment Plant | WA0020281 | Final | 2017-12-01 | 2022-11-30 |
| Fort Lewis | Joint Base Lewis-McChord (JBLM) MS4 (Stormwater) | WAS026638 | Final | 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 (Washington Fish Hatcheries) | WAG130000 | Final | 2016-08-01 | 2021-07-31 |
| Mt. Rainier National Park | Paradise Wastewater Treatment Plant | WA0025569 | Final | 2017-02-01 | 2022-01-31 |
| Leavenworth | Leavenworth National Fish Hatchery | WA0001902 | Final | 2018-01-01 | 2022-12-31 |
| Grand Coulee Dam | Grand Coulee Dam Wastewater Treatment Plant | WA0024163 | Final | 2014-08-01 | 2019-07-31 |
| Harrah (Yakama Reservation) | Town of Harrah Wastewater Treatment Plant | WA0022705 | Final | 2012-10-01 | 2017-09-30 |
| Fort Lewis | Joint Base Lewis-McChord (JBLM) Solo Point Wastewater Treatment Plant | WA0021954 | Final | 2012-04-01 | 2017-04-01 |
| Suquamish (Port Madison Reservation) | Suquamish Wastewater Treatment Plant (Current Permit) | WA0023256 | Final | 2008-06-01 | 2013-05-31 |
| Suquamish (Port Madison Reservation) | Suquamish Wastewater Treatment Plant (Proposed Permit) | WA0023256 | Draft | N/A | N/A |
| Bellingham (Lummi Reservation) | Lummi Sandy Point Wastewater Treatment Plant | WA0025658 | Final | 2011-12-01 | 2016-11-30 |
| Bellingham (Lummi Reservation) | Lummi Gooseberry Point Wastewater Treatment Plant | WA0025666 | Final | 2011-12-01 | 2016-11-30 |
| Bellingham (Lummi Reservation) | Lummi Kwina Road Membrane Bioreactor (MBR) Wastewater Treatment Plant | WA0026727 | Final | 2015-08-01 | 2020-07-31 |
| Neah Bay (Makah Reservation) | Makah Wastewater Treatment Plant | WA0023213 | Final | 2016-07-01 | 2021-06-30 |
| Oak Harbor | Naval Air Station Whidbey Island Ault Field Wastewater Treatment Plant | WA0003468 | Final | 2011-03-01 | 2016-02-28 |
| Oak Harbor | Naval Air Station Whidbey Island MS4 (Stormwater) | WAS026611 | Final | 2021-02-01 | 2026-01-31 |
| Richland | Pacific Northwest National Laboratory (PNNL) - Tracer Injection Project | WA0026859 | Final | 2018-06-01 | 2023-05-31 |
| 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 |
Final | 2020-05-01 | 2025-04-30 |
| Bremerton | Puget Sound Naval Shipyard | WA0002062 | Final | 1994-04-01 | 1999-04-01 |
| Puyallup (Puyallup Reservation) | Puyallup Wastewater Treatment Plant | WA0037168 | Final | 2014-12-01 | 2019-11-30 |
| Queets(Quinault Reservation) | Queets Village Wastewater Treatment Plant | WA0023442 | Final | 2014-10-01 | 2019-09-30 |
| Moclips (Quinault Reservation) | Moclips River Estates Wastewater Treatment Plant | WA0026603 | Final | 2017-12-01 | 2022-11-30 |
| Anacortes (Swinomish Reservation) | Swinomish North End Wastewater Treatment Plant | WA0025062 | Final | 2012-07-01 | 2017-06-30 |
| Anacortes (Swinomish Reservation) | Swinomish Shelter Bay Wastewater Treatment Plant | WA0024422 | Final | 2012-07-01 | 2017-06-30 |
| Taholah (Quinault Reservation) | Tahola Village Wastewater Treatment Plant | WA0023434 | Final | 2015-07-01 | 2020-06-30 |
| Toppenish (Yakama Reservation) | Toppenish Wastewater Treatment Plant | WA0026123 | Final | 2013-07-01 | 2018-06-30 |
| Tulalip Reservation | Tulalip Wastewater Treatment Plant | WA0024805 | Final | 2009-11-01 | 2014-10-31 |
| Oso | Naval Radio Station (Transmitter (T)) Jim Creek | WA0026573 | Final | 2015-06-01 | 2020-05-30 |
| Bangor | Naval Base Bangor | WA0025577 | Final | 2010-09-01 | 2015-08-31 |
| Wapato (Yakama Reservation) | Wapato Wastewater Treatment Plant | WA0050229 | Final | 2011-11-01 | 2016-10-31 |
| Toppenish (Yakama Reservation) | Washington Beef | WA0050202 | Final | 2010-02-01 | 2015-01-31 |
| Toppenish (Yakama Reservation) | Legends Casino Wastewater Treatment Plant | WA0026743 | Final | 2013-11-01 | 2018-10-31 |
| Wellpinit (Spokane Reservation) | Dawn Mining Company Midnite Mine | WA0026841 | Final | 2019-01-01 | 2023-12-31 |
| Wellpinit (Spokane Reservation) | Wellpinit Wastewater Treatment Plant | WA0025704 | Final | 2019-04-01 | 2024-03-31 |
| Marine Waters | General Permit for Tribal Marine Net Pen Enhancement Facilities in Washington | WAG132000 | Final | 2015-11-01 | 2020-10-31 |
| Oak Harbor | Naval Air Station Whidbey Island Seaplane Base Lagoon Wastewater Treatment Plant | WA0026760 | Final | 2018-12-27 | 2023-12-26 |
| Manchester | Naval Fleet Logistics Center Puget Sound | WA0002780 | Final | 2021-02-01 | 2026-01-31 |
| Everett | Naval Station Everett MS4 (Stormwater) | WAS026620 | Final | 2021-02-01 | 2026-01-31 |
| Bremerton | Naval Base Kitsap MS4 (Stormwater) | WAS026646 | Final | 2021-02-01 | 2026-01-31 |
| Lower Columbia River | Discharge Permits for 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 |
Draft | N/A | N/A |
| Lower Snake River | Discharge Permits for 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 |
Draft | N/A | N/A |