| Ada | Ada County Highway District, Boise State University, City of Boise, City of Garden City, Drainage District #3, and Idaho Transportation Department District #3 | IDS-027561 | Boise River and associated tributaries | 17050114SW011a_06, 170050114SW005_06, 17050114SW001_06, 17050114SW008_03, 17050114SW010_02 and 03, 17050114SW010_03 | 11/01/12 |
| Ada | Boise (City of) Lander Street Wastewater Treatment Facility | ID-00020443 | Boise River, Lower Snake River | 17050114SW005_06 | 08/31/12 |
| Ada | Boise (City of) West Boise Wastewater Treatment Facility | ID-002398-1 | Boise River, Lower Snake River | 17050114SW005_06 | 08/31/12 |
| Bannock | Pocatello (City of) Wastewater Treatment Facility | ID-0021784 | Portneuf River above American Falls Reservoir | 17040208SK001_05 | 07/12/12 |
| Bingham | Firth (City of) West Boise Wastewater Treatment Facility | ID-0024988 | Snake River | 17040206SK022_04 | 02/11/13 |
| Blaine | Ketchum (City of) Wastewater Treatment Plant | ID-0020281 | Big Wood River | 17040219SK004_05 | 04/13/12 |
| Blaine | The Meadows LLC Wastewater Treatment Plant | ID-0024422 | Big Wood River | 17040219SK007_05 | 04/16/12 |
| Blaine | Hailey (City of) Wastewater Treatment Plant | ID-0020303 | Big Wood River | 17040219SK004_05 | 04/13/12 |
| Bonner | Priest River (City of) Wastewater Treatment Plant | ID-002080-0 | Pend Oreille River | 17010214PN001_08 | 09/29/11 |
| Bonneville | Idaho Falls (City of) Wastwater Treatment Plant | ID-0021261 | Snake River | 17040201SK001_04 | 08/06/12 |
| Boundary | Bonners Ferry (City of) Wastewater Treatment Plant | ID-002022-2 | Kootenai River | 17010104PN029_08 | 09/16/11 |
| Canyon | Greenleaf (City of) Wastewater Treatment Plant | ID-002830-4 | West End Drain | Nearest downstream AU is 17050114SW001_02, Dixie Slough | 11/02/12 |
| Elmore | Glenns Ferry (City of) Wastewater Treatment Plant | ID-002200-4 | Mid-Snake and Portneuf rivers | 17050101SW005_07 | 10/04/11 |
| Idaho | Red River Ranger Station Wastewater Treatment Plant | ID-002069-9 | South Fork Red River | N/A | 02/03/12 |
| Idaho | Riggins (City of) Wastewater Treatment Plant | ID-002093-1 | Salmon River | 17060209SL011_07 | 08/07/12 |
| Idaho | Slate Creek Ranger Station Wastewater Treatment Plant | ID-0020737 | Salmon River | 17060209SL011_07 | 09/04/12 |
| Idaho | Fenn Ranger Station Wastewater Treatment Plant | ID-002071-1 | Selway River | 17060302CL001_06 | 09/10/12 |
| Kootenai | Coeur d'Alene (City of) MS4 | IDS-028215 | Coeur d'Alene Lake, Spokane River | Multiple outfalls | 10/22/08 |
| Kootenai | Idaho Transportation Department MS4 | IDS-028223 | Fernan Creek, Coeur d'Alene Lake | Multiple outfalls | 10/22/08 |
| Kootenai | Lakes Highway District MS4 | IDS-028207 | Hayden Lake | Multiple outfalls | 10/22/08 |
| Kootenai | Post Falls (City of) MS4 | IDS-028231 | Spokane River | Multiple outfalls | 10/22/08 |
| Kootenai | Post Falls Highway District MS4 | IDS-028193 | Spokane River | Multiple outfalls | 10/22/08 |
| Kootenai | U.S. Silver Corporation - Coeur and Galena Mines and Mills | ID-000002-7 | Lake Creek, South Fork Coeur d'Alene River | Multiple outfalls | 09/29/06 |
| Owyhee | Homedale (City of) Wastewater Treatment Facility | ID-002042-7 | Snake River | 17050103SW001_07 | 05/08/13 |
| Payette | Fruitland (City of) Wastewater Treatment Plant | ID-002119-9 | Payette River | 17050122SW001_06 | 09/26/11 |
| Payette | Fruitland (City of) Wastewater Treatment Plant | ID-002033-8 | Snake River | 17050115SW001_08 | 09/22/11 |
| Shoshone | Clarkia Water and Sewer District Wastewater Treatment Plant | ID-002507-1 | St. Maries River | 17010304PN015_05 | 11/14/11 |
| Washington | Weiser (City of) Wastewater Treatment Plant | ID-002029-0 | Snake River | 17050201SW004_08 | 10/04/11 |