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Discharge permits in Idaho
151 active individual NPDES permits with limits in EPA's file of Oct 22, 2026.
By industry
Sewage treatment plants (121)
- Aberdeen, City of ID0020176
- Ahsahka Water and Sewer District ID0025224
- American Falls, City of ID0020753
- Blackfoot, City of ID0020044 · major
- Boise, City of ID0020443 · major
- Boise, City of ID0023981 · major
- Bonners Ferry, City of ID0020222
- Bovill, City of ID0022861
- Buhl, City of ID0020664
- Burley, City of ID0000663 · major
- Burley, City of ID0020095 · major
- Caldwell, City of ID0021504 · major
- Cambridge, City of ID0021806
- Carey, City of ID0025747
- Cascade, City of ID0023167
- City of Ketchum ID0020281 · major
- Clarkia Water and Sewer District ID0025071
- Coeur D Alene, City of ID0022853 · major
- Cottonwood, City of ID0021849
- Council, City of ID0020087
- Craigmont, City of ID0021288
- Culdesac, City of ID0024490
- City of Moyie Springs ID0030040
- Deary, City of ID0020788
- Dover, City of ID0027693
- Driggs, City of ID0020141
- Downhill LLC (dba, Edge Resort) ID0030015
- Eastern Idaho Regional Sewer District ID0020133 · major
- Elk City Water and Sewer Association ID0022012
- Elk River, City of ID0020362
- Elk Valley Subdivision ID0027979
- Emida, City of (Waste Water Facility) ID0028487
- Emmett, City of ID0020311
- Fairfield, City of ID0024384
- Filer, City of ID0020061
- Firth, City of ID0024988
- Franklin, City of ID0025569
- Fruitland, City of ID0020338
- Fruitland, City of ID0021199
- Genesee City of ID0030112
- Genesee, City of ID0020125
- Glenns Ferry, City of ID0022004
- Gooding, City of ID0020028
- Grace, City of ID0023825
- Grangeville, City of ID0020036
- Greenleaf, City of ID0028304
- Hagerman, City of ID0025941
- Hailey, City of ID0020303 · major
- Hansen, City of ID0022446
- Harrison, City of ID0021997
- Hayden Area Regional Sewer Board ID0026590 · major
- Heyburn, City of ID0020940
- Homedale, City of ID0020427
- Horseshoe Bend, City of ID0021024
- Idaho Falls, City of ID0021261 · major
- Jerome, City of ID0020168 · major
- Juliaetta, City of ID0023761
- Jug Mountain Ranch LLC ID0028029
- Kamiah, City of ID0028002
- Kendrick, City of ID0024554
- Kooskia, City of ID0021814
- Kootenai-Ponderay Sewer District ID0021229
- Kuna, City of ID0028355 · major
- Lava Hot Springs, City of ID0021822
- Lewiston, City of ID0022055 · major
- Mackay, City of ID0023027
- Marsing, City of ID0021202
- Meridian, City of ID0020192 · major
- Mid-Valley Sewer Company LLC ID0024422
- Middleton, City of ID0021831
- Montpelier, City of ID0025585
- Moscow, City of ID0021491 · major
- Nampa, City of ID0022063 · major
- New Meadows, City of ID0023159
- New Plymouth, City of ID0020389
- Nez Perce Tribe Water Resources Division ID0028347
- Nezperce, City of ID0020397
- North Idaho Correctional Institution ID0025887
- Notus, City of ID0021016
- Orofino, City of ID0020150
- Parma, City of ID0021776
- Payette Lakes Recreational Water and Sewer District - Mccall WWTP ID0020231 · major
- Payette, City of ID0020672 · major
- Pierce, City of ID0020206
- Plummer, City of ID0022781
- Pocatello, City of ID0021784 · major
- Post Falls, City of ID0025852 · major
- Potlatch, City of ID0022501
- Preston, City of ID0020214 · major
- Priest River, City of ID0020800
- Princeton-Hampton Water & Sewer District ID0028436
- Puttman Infrastructure, Inc. ID0030091
- Rexburg, City of ID0023817 · major
- Richfield, City of ID0021211
- Rigby, City of ID0020010
- Riggins, City of ID0020931
- Ririe, City of ID0026174
- Riverside Water and Sewer District ID0024503
- Roberts, City of ID0026913
- Rockland, City of ID0022047
- Salmon, City of ID0020001
- Sandpoint, City of ID0020842 · major
- Santa-Fernwood Sewer District ID0022845
- Shoshone, City of ID0023728
- Smelterville, City of ID0020117
- Soda Springs WWTP, City of ID0020818 · major
- South Fork Coeur D Alene River Sewer District ID0021296
- South Fork Coeur D Alene River Sewer District ID0021300 · major
- ST. Anthony, City of ID0020401
- ST. Maries, City of ID0022799
- Star Sewer and Water District ID0023591 · major
- Tensed, City of ID0025101
- Troy, City of ID0023604
- Twin Falls, City of ID0021270 · major
- Viola Water and Sewer District ID0026310
- Weippe, City of ID0020354
- Weiser, City of ID0020290 · major
- White Bird, City of - White Bird WWTP ID0024252
- Wilder, City of ID0020265
- Winchester, City of ID0020184
- Worley, City of ID0022713
Industrial and other (30)
- Amalgamated Sugar Co LLC ID0000230 · Beet Sugar
- Bennett Lumber Products Inc ID0020532 · Sawmills And Planing Mills, General
- Boise, City of ID0025488 · Steam And Air-Conditioning Supply
- Clearwater Paper Corporation ID0001163 · major · Pulp Mills
- Dworshak Dam - Usace ID0028586 · Electric And Other Services Combined
- Dworshak Reservior - Usacoe ID0028444 · Tanks And Tank Components
- Garden Creek Farms ID0028533 · Fish Hatcheries And Preserves
- Hecla Limited ID0026468 · major · Gold Ores
- Hecla LTD ID0000167 · Silver Ores
- Hecla LTD ID0000175 · major · Silver Ores
- Henggeler Packing Co Inc ID0027901 · Crop Preparation Services For Market
- Idaho Cobalt Project ID0028321 · major · Ferroalloy Ores, Except Vanadium
- Idaho Power Co ID0020907 · Electric Services
- Independent Meat Co ID0000388 · Meat Packing Plants
- JK Potatoes LLC ID0030104 · Crop Preparation Services For Market
- Kamiah, City of - Water Treatment Plant ID0028461 · Water Supply
- Kootenai Tribe of Idaho ID0028291 · Hunting, Trapping, Game Propagation
- Mccain Foods USA Inc ID0000612 · major · Frozen Fruits And Vegetables
- Meridian Beartrack Company ID0027022 · major · Gold Ores
- Noranda Mining Inc ID0025259 · Ferroalloy Ores, Except Vanadium
- P4 Production LLC ID0001198 · Industrial Inorganic Chemicals
- Potlatchdeltic Land and Lumber LLC ID0000019 · Softwood Veneer And Plywood
- Riverside Water and Sewer District ID0021237 · Water Supply
- Seneca Foods Corp ID0000213 · Canned Specialties
- Silver Opportunity Partners LLC ID0000060 · Silver Ores
- Sorrento Lactalis Inc ID0028037 · Cheese, Natural And Processed
- Thompson Creek Mining Company ID0025402 · major · Ferroalloy Ores, Except Vanadium
- U.S. Army Corps of Engineers, Seattle District ID0028584 · Electric Services
- U.S. Silver Corp - Idaho Inc ID0000027 · major · Silver Ores
- U.S. Silver Corp - Idaho Inc ID0025429 · Silver Ores
Source: EPA ECHO, Oct 22, 2026. As JSON: /api/v1/permits?state=ID · MCP: https://passage-data.com/mcp · All states