Montana NPDES Permits
In Montana, EPA issues all NPDES permits on tribal lands. See the table below for final and draft permits issued by EPA. All other permits are issued by the Montana Dept. of Environmental Quality.
For state-issued permits, visit Montana Pollutant Discharge Elimination SystemExit
Final and draft permits
The table below contains all final (i.e. active) and draft (i.e. proposed) NPDES permits issued by EPA within Montana. It includes permits for individual facilities, general permits, and stormwater permits. Click on the facility/permit name to view the permit and supporting documents.
| Location | Facility or Permit Name | Permit Number | Permit Type | Permit Status | Effective Date |
|---|---|---|---|---|---|
| Flathead Reservation (Sanders County) | Town of Hot Springs Wastewater Treatment Facility | MT0020591 | Individual | Draft | |
| Flathead Reservation (Sanders County) | Town of Hot Springs Wastewater Treatment Facility | MT0020591 | Individual | Final | 07/01/2018 |
| Flathead Reservation (Lake County) | City of Polson Wastewater Treatment Facility | MT0020559 | Individual | Final | |
| Flathead Reservation (Lake County) | City of Ronan Wastewater Treatment Facility | MT0021474 | Individual | Final | 06/03/2013 |
| Crow Indian Reservation (Big Horn County) | Town of Lodge Grass Wastewater Treatment Facility | MT0021890 | Individual | Final | 05/01/2017 |
| Crow Indian Reservation (Big Horn County) | Soap Creek Oil Field Wastewater Treatment Facility | MT0023183 | Individual | Final | 06/01/2008 |
| Flathead Reservation (Lake County) | Charlo Wastewater Treatment Facility | MT0022551 | Individual | Final | 09/01/2012 |
| Flathead Reservation (Lake County) | Yellow Bay Wastewater Treatment Facility | MT0023388 | Individual | Final | 07/01/2012 |
| Northern Cheyenne Indian Reservation (Rosebud County) | Lame Deer Lagoon Wastewater Treatment Facility | MT0029360 | Individual | Final | 01/17/2018 |
| Flathead Reservation (Lake County) | Woodcock Home Wastewater Treatment Facility | MT0030554 | Individual | Final | 01/01/2013 |
| Blackfeet Reservation (Glacier County) | Blackfeet Community Water Treatment Plant | MT0030643 | Individual | Final | 01/01/2013 |
| Crow Indian Reservation (Big Horn County) | City of Hardin Wastewater Treatment Facility | MT0030759 | Individual | Draft | |
| Crow Indian Reservation (Big Horn County) | City of Hardin Wastewater Treatment Facility | MT0030759 | Individual | Final | 07/01/2018 |
| Crow Indian Reservation (Big Horn County) | City of Hardin Water Treatment Plant | MT0030767 | Individual | Final | 03/01/2017 |
| Crow Indian Reservation (Big Horn County) | Westmoreland Resources, Inc. Absaloka Mine South Extension | MT0030783 | Individual | Final | 10/01/2014 |
| Fort Peck Reservation (Roosevelt County) | City of Wolf Point Wastewater Treatment Facility | MT0030571 | Individual | Draft | |
| Fort Peck Reservation (Roosevelt County) | City of Wolf Point Wastewater Treatment Facility | MT0030571 | Individual | Final | 07/01/2018 |
| Fort Peck Reservation (Valley and Roosevelt Counties) | Northern Border Pipeline Company | MT0030791 | Individual | Final | 10/01/2013 |
| Flathead Reservation (Lake County) | Keller Transport, Inc. Groundwater Remediation Treatment Facility | MT0030805 | Individual | Final | 05/03/2018 |
| Flathead Reservation (Lake County) | St. Ignatius-Southside Wastewater Treatment Facility | MT0029017 | Individual | Final | 06/01/2010 |
| Flathead Reservation (Lake County) | Jocko River Trout Hatchery Wastewater Treatment Facility | MT0030564 | Individual | Final | 01/01/2017 |
| Crow Indian Reservation (Big Horn County) | Yellowtail Dam Wastewater Treatment Facility | MT0022993 | Individual | Final | 11/01/2016 |
| Crow Indian Reservation (Big Horn County) | Yellowtail Dam Visitor Center Wastewater Treatment Facility | MT0029106 | Individual | Final | 11/01/2016 |
| Crow Indian Reservation (Big Horn County) | Sunlight Ranch Company, Little Horn Unit | MT0029424 | Individual | Final | 09/01/2017 |
| Blackfeet Reservation (Glacier County) | City of Cut Bank Water Treatment Plant | MT0030562 | Individual | Final | 05/18/2017 |
| Flathead Reservation (Lake County) | City of Ronan Water Treatment Plant | MT0030821 | Individual | Final | 09/01/2012 |
| Crow Indian Reservation (Big Horn County) | Crow Nation Water Treatment Plants | MT0030538 | Individual | Final | 04/01/2014 |
| Blackfeet Reservation (Glacier County) | Glendale Colony, Inc. and Harvey Farms, Inc. | MT0031819 | Individual | Final | 04/01/2014 |
| Crow Indian Reservation (Big Horn County) | Crow Municipal Rural & Industrial (MR&I) Pilot Water Treatment Plant | MT0031827 | Individual | Final | 03/01/2015 |
| Various | Wastewater Lagoons in Indian Country | MTG589### | General | Final | 01/01/2016 |