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Discharge permits in Washington
426 active individual NPDES permits with limits in EPA's file of Oct 22, 2026.
By industry
Sewage treatment plants (208)
Industrial and other (218)
- AMG Aluminum North American LLC WA0002976 · Aluminum Rolling And Drawing
- Alcoa Wenatchee LLC WA0000680 · major
- Alleima Special Metals WA0003701 · Nonferrous Rolling And Drawing
- Allweather Wood LLC WA0040029 · Wood Preserving
- Alon Asphalt Company WA0003239 · Asphalt Paving Mixtures And Blocks
- Alon Asphalt Company WA0031704 · Transportation Services
- Ash Grove Cement Company WA0032221 · Cement, Hydraulic
- Avista Corp - Kettle Falls WA0045217 · Electric Services
- B&L Woodwaste Site Custodial Trust WA0040321 · Refuse Systems
- BNSF Railway Company WA0032123
- Bonneville Project - Usace WA0026778 · Electric Services
- BP Cherry Point Refinery WA0022900 · major · Petroleum Refining
- Bell Lumber & Pole Washington LLC WA0030813 · Wood Preserving
- Bio Pappel International Inc WA0002925 · major · Paper Mills
- Blau Oyster Co. Inc. WA0029262 · Fresh Or Frozen Prepared Fish
- Boeing EHS Group WA0991001
- Boise Cascade Wood Products, Llc. - Arden Lumber WA0045527
- Bradken Inc WA0022918 · Steel Foundries
- Columbia Gorge Aluminum Company WA0000540 · Primary Aluminum
- Cascadia Holding Bainbridge LLC WA0023469 · Skilled Nursing Care Facilities
- CenTrio Energy Seattle LLC WA0001503 · Steam And Air-Conditioning Supply
- Chemtrade Sulex Inc WA0031283 · Industrial Inorganic Chemicals
- Chevron Environmental Management Co WA0991007 · Petroleum Bulk Stations & Terminals
- City of Camas WA0020249
- City of Castle Rock WA0022683
- City of Davenport WA0045578
- City of Elma WA0023132
- City of Hoquiam WA0020915 · major
- City of Ilwaco WA0023159
- City of Long Beach WA0022489
- City of McCleary WA0024040
- City of Montesano WA0024660
- City of Mossyrock WA0021024
- City of North Bonneville WA0023388
- City of Ocean Shores WA0023817
- City of Quincy WA0021067 · major · Frozen Fruits And Vegetables
- City of Raymond WA0041041
- City of Stevenson WA0020672
- City of Tacoma WA0037087 · major
- City of Westport WA0020923
- City of Woodland WA0020401
- Clark Public Utilities WA0040932 · Electric Services
- Clark Regional Wastewater District WA0023272
- Columbia River Carbonates WA0039721 · Crushed And Broken Limestone
- Concrete Technology Corp WA0001864 · Concrete Products
- Cosmo Specialty Fibers Inc. WA0000809 · major · Pulp Mills
- Cowlitz County Public Works WA0037770
- Cowlitz Tribal Member Services WA0040258
- Custom Seafood Services, Inc. WA0002291
- Dawn Mining Company WA0025721 · major · Uranium-Radium-Vanadium Ores
- Dawn Mining Company LLC WA0026841 · Uranium-Radium-Vanadium Ores
- Defense, Navy WA0002062 · major · Ship Building And Repairing
- Defense, Navy WA0025577 · Ship Building And Repairing
- Defense, Navy WA0026573 · National Security
- Dakota Creek Industries Inc WA0031411 · Ship Building And Repairing
- Darigold WA0052078 · Cheese, Natural And Processed
- Darigold, Inc WA0002470 · Fluid Milk
- Darigold, Inc. WA0037478 · Fluid Milk
- Dickey Farms Inc WA0050407
- Divert Integrated Food Recovery Facility WA0991060
- Dulcich Inc. dba Pacific Seafood Group WA0041114 · Animal Aquaculture
- Echo Bay Minerals Company WA0991005
- Energy Northwest WA0025151
- Everett Ship Repair LLC WA0991034
- Evergreen Fuel & Lubes, LLC WA0038784 · Petroleum Bulk Stations & Terminals
- Freeman School District 358 WA0045403 · Elementary And Secondary Schools
- Graymont Western US Inc WA0001007 · Lime
- Georgia-Pacific LLC WA0000256 · major · Pulp Mills
- Georgia-Pacific LLC WA0031984 · Refuse Systems
- Grant County Public Utility District WA0991028
- Grant PUD WA0991013
- Grant PUD @ Wanapum/Priest WA0991029
- Grays Harbor County WA0037095
- Guemes Channel Holdings, LLC WA0501491 · Boat Building And Repairing
- Hansen Boat Company WA0031909 · Ship Building And Repairing
- HF Sinclair Puget Sound Refining LLC WA0002941 · major · Petroleum Refining
- Hughes Farms Inc. WA0991008
- Ice Harbor Lock and Dam - Usace WA0026816 · Electric Services
- Intalco Aluminum Corporation WA0002950 · major
- Interior, Fish & Wildlife WA0001902 · Fish Hatcheries And Preserves
- Ice Floe LLC dba Nichols Brothers Boat Builders WA0032166
- Inland Empire Paper Company WA0000825 · major
- John Day Project - Usace WA0026832 · Electric Services
- JT Marine WA0039438
- Kaiser Aluminum Washington WA0000892 · major · Aluminum Sheet, Plate, And Foil
- King County Dept of Natural Resources and Parks WA0032247 · major
- Kinross-Crown Resources-Buckhorn Operations WA0052434 · Gold Ores
- Lake Union Drydock Co WA0030074 · Ship Building And Repairing
- Lehigh Northwest Cement Co WA0001198 · Cement, Hydraulic
- Little Goose Lock and Dam - Usace WA0026786 · Electric Services
- Lower Granite Lock and Dam - Usace WA0026794 · Electric Services
- Lower Monumental Lock and Dam - Usace WA0026808 · Electric Services
- Lafarge PNW Inc. WA0002232 · Cement, Hydraulic
- Lamb Weston Richland WA0052141 · Frozen Fruits And Vegetables
- Lewis County Water District #2 WA0024546
- Mcnary Lock and Dam - Usace WA0026824 · Electric Services
- Manke Lumber Company Superior Wood WA0040339 · Sawmills And Planing Mills, General
- Marine Fluid Systems, Inc. WA0032174
- Mason County Dept of Utilities & Waste Management WA0038075
- Metro Metals Northwest Inc WA0040991 · Scrap And Waste Materials
- Milne Fruit Products WA0052060 · Frozen Fruits And Vegetables
- Milne Fruit Products Inc WA0052272 · Frozen Fruits And Vegetables
- Motive Power Marine Shipyard WA0041106 · Ship Building And Repairing
- Navy Base Kitsap WA0002780 · Petroleum Bulk Stations & Terminals
- Northlake Shipyard Inc WA0030864 · Ship Building And Repairing
- NPD Management LLC WA0991044 · Subdividers And Developers
- Nucor Steel Seattle Inc WA0031305 · Blast Furnaces And Steel Mills
- National Fish and Oyster, Inc WA0038407 · Fresh Or Frozen Prepared Fish
- Nippon Dynawave Packaging Company Longview WA0000124 · major · Pulp Mills
- Nisbet Oyster Co WA0040363 · Fresh Or Frozen Prepared Fish
- Norm Nelson Inc. WA0991004 · Crop Preparation Services For Market
- North Pacific Paper Company, LLC WA0991016 · Paper Mills
- Occidental Chemical Corp WA0037265 · Industrial Inorganic Chemicals
- Ocean Companies WA0041971 · Fresh Or Frozen Prepared Fish
- Ocean Spray Cranberries Inc WA0003271 · Canned Fruits And Vegetables
- Olympia Oyster Company WA0037133 · Fresh Or Frozen Prepared Fish
- Olympic Water & Sewer, Inc. WA0021202
- Pacific Aquaculture Inc WA0026328 · Animal Aquaculture
- Pacific Aquaculture Inc WA0026336 · Animal Aquaculture
- Pacific Aquaculture Inc WA0026719 · Animal Aquaculture
- Pacific Coast Coal Company WA0030830 · Coal Mining Services
- Pacific Functional Fluids, LLC WA0038679 · Petroleum Bulk Stations & Terminals
- Port of Vancouver WA0039942 · Water Transportation Of Freight
- Port Townsend Paper Corporation WA0000922 · major · Pulp Mills
- PUD No. 1 of Chelan County WA0991032
- PUD No. 1 of Chelan County WA0991033
- PacWest Energy LLC WA0991025
- PacifiCorp Merwin Hydroelectric Project WA0041165 · Electric Services
- PacifiCorp Swift No 1 Hydroelectric Project WA0041157 · Electric Services
- PacifiCorp Yale Hydroelectric Project WA0041149
- Pacific Fishermen and Electric LLC WA0031046 · Ship Building And Repairing
- Pacific Shellfish - South Bend, LLC WA0002186 · Fresh Or Frozen Prepared Fish
- Packaging Corporation of America - Wallula Mill WA0003697 · major · Paper Mills
- Phillips 66 WA0002984 · major · Petroleum Refining
- Phillips 66 Company WA0001945 · Petroleum Bulk Stations & Terminals
- Phillips 66 Company WA0991035
- Phillips 66 Tacoma Terminal WA0000728 · Petroleum Bulk Stations & Terminals
- Ponderay Industries WA0045268 · major · Paper Mills
- Port of Bellingham WA0001091 · major · Pulp Mills
- Port of Bellingham WA0032239 · Refuse Systems
- Port of Seattle WA0024651 · Airports, Flying Fields, & Services
- Project Macoma WA0991051 · Commercial Physical Research
- Public Utility District No. 1 of Douglas County WA0991031
- Puget Sound Energy WA0030601 · Electric Services
- Puget Sound Energy WA0031291 · Electric Services
- Puget Sound Energy WA0040827 · Natural Gas Transmission
- Regency Centers WA0991040 · Sanitary Services
- Riverence Limited Partnership WA0040819 · Fish Hatcheries And Preserves
- SDS Lumber Company LLC WA0051152 · Wood Products
- Seattle Iron and Metals Corporation WA0031968 · Scrap And Waste Materials
- Seh America Inc WA0039616 · Primary Nonferrous Metals
- Squaxin Island Tribe WA0037320 · Fresh Or Frozen Prepared Fish
- Safe Coast Seafoods Washington WA0000361 · Fresh Or Frozen Prepared Fish
- Schnitzer Steel of Tacoma WA0040347 · Scrap And Waste Materials
- SeaPort Sound Terminal LLC WA0003204 · Special Warehousing And Storage
- Seashore Villa Mobile Home Park/Emerald Properties WA0037273
- Selkirk School District WA0044938 · Elementary And Secondary Schools
- Shore Terminal LLC WA0039501 · Petroleum Bulk Stations & Terminals
- Silver Cloud Inns and Hotels WA0041084 · Hotels And Motels
- Sitca LLC WA0991037 · Sanitary Services
- Smith & Morrison Farms WA0031739
- Snoqualmie Pass Utility District WA0991042
- South Bend Products LLC WA0040941 · Fresh Or Frozen Prepared Fish
- South Bend Products, LLC WA0000159 · Canned And Cured Fish And Seafoods
- Specialty Chemical Products LLC WA0002861 · Industrial Inorganic Chemicals
- Stabbert Yacht & Ship LLC WA0030996 · Ship Building And Repairing
- Steelscape Washington LLC WA0040851 · major · Cold Finishing Of Steel Shapes
- Stella -Jones Corporation WA0030805 · Wood Preserving
- Stella-Jones Corporation WA0037953 · Wood Preserving
- Swift No 2 Hydro Electric Project WA0041131 · Electric Services
- Taylor Shellfish Farms WA0002607 · Fresh Or Frozen Prepared Fish
- The Dalles Lock and Dam WA0026701 · Electric Services
- Taiga Building Products USA Ltd, DBA Exterior Wood WA0040711 · Wood Preserving
- Teck Cominco Incorporated WA0001317
- Tekni-Plex, Inc. WA0003492 · Converted Paper Products
- The Port of Olympia WA0040533 · Wood Preserving
- The Town of Pe Ell WA0020192
- Tidewater Barge Lines/Tidewater Terminal Company WA0038776 · Ship Building And Repairing
- Town of Metaline Falls WA0991009
- Town of Reardan WA0045306
- Town of Spangle WA0991010
- TransAlta Centralia Mining LLC WA0037338 · major · Bituminous Coal And Lignite - Surface
- TransAlta Centralia Mining LLC WA0040215 · Electric Services
- Transalta Centralia Generation LLC WA0001546 · major · Electric Services
- Tree Top, Inc WA0051527 · Frozen Fruits And Vegetables
- Tree Top, Inc. WA0002437 · Canned Fruits And Vegetables
- Twin City Foods, Inc. WA0021768 · Refrigerated Warehousing And Storage
- U.S. Army Corps of Engineers WA0026891 · Electric Services
- U.S. Bureau of Reclamation - Coulee Dam WA0026867 · Electric Services
- US Department of Energy - Pacific NW Site Office WA0040649 · Noncommercial Research Organizations
- US Oil and Refining Co. WA0001783 · major · Petroleum Refining
- Unknown WA0000086 · Marine Cargo Handling
- Unknown WA0000281 · major · Cyclic Crudes And Intermediates
- Unknown WA0000761 · major · Petroleum Refining
- Unknown WA0000884 · major · Paperboard Mills
- Unknown WA0003671 · Chemicals & Allied Products
- Unknown WA0003699 · Farm Supplies
- Unknown WA0003727 · Nitrogenous Fertilizers
- Unknown WA0024961 · Electric Services
- Unknown WA0039641 · Electric Services
- Unknown WA0991012 · Alkalies And Chlorine
- Unknown WA0991014 · Wood Products
- Unknown WA0991024 · Industrial Inorganic Chemicals
- VB Homestead Farms Inc WA0052311 · Flavoring Extracts And Syrups
- Vaagen Bros Lumber Inc WA0133004 · Sawmills And Planing Mills, General
- Vigor Industrial LLC WA0002615 · Ship Building And Repairing
- Wa State Patrol WA0031836 · Fire Protection
- Washington Beef LLC WA0050202 · Meat Packing Plants
- Washington Bulb Co Inc WA0031721
- Wa State Parks & Recreation Commission WA0038709
- Washington State Department of Corrections WA0038938
- Washington State Dept. of Ecology WA0991068 · Air, Water, & Solid Waste Management
- Washington Water Service Company WA0029891 · Hotels And Motels
- WestRock CP, LLC WA0000850 · Paperboard Mills
- WestRock Longview, LLC WA0000078 · major · Paper Mills
- Western Towboat Company WA0032191 · Boat Building And Repairing
- Western Wood Preserving Company WA0040738 · Wood Preserving
- Wiegardt Bros WA0038806 · Fresh Or Frozen Prepared Fish
Source: EPA ECHO, Oct 22, 2026. As JSON: /api/v1/permits?state=WA · MCP: https://passage-data.com/mcp · All states