Wyoming NPDES Permits
In Wyoming, EPA issues all NPDES permits on tribal lands (see table below). All other permits are issued by the Wyoming Department of Environmental Quality.
For state-issued permits, visit Wyoming Pollutant Discharge Elimination System Program
Related pages:
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 |
|---|---|---|---|---|---|
| Various | General Permit for Wastewater Discharges Associated with Drinking Water Production in Indian Country | WYDW#### | Final | 2019-07-31 | 2024-06-30 |
| Various | General Permit for Wastewater Lagoons in Indian Country | WYG589### | Final | 2022-04-01 | 2027-03-31 |
| Wind River Indian Reservation (Fremont County) | Wesco Operating, Inc. – Lander Field | WY0000221 | Final | 2017-11-01 | 2022-10-31 |
| Wind River Indian Reservation (Fremont County) | Wesco Operating, Inc. – Maverick Springs | WY0000469 | Final | 2008-01-01 | 2012-12-31 |
| Wind River Indian Reservation (Fremont County) | Merit Energy Company – Maverick Springs Battery in Wyoming | WY0000779 | Final | 2020-07-01 | 2025-06-30 |
| Wind River Indian Reservation (Fremont County) | Merit Energy Company – Chatterton Battery | WY0000922 | Final | 2020-07-01 | 2025-06-30 |
| Wind River Indian Reservation (Fremont County) | Wind River Energy Commission – Circle Ridge Field in Wyoming | WY0000949 | Final | 2021-06-01 | 2025-06-30 |
| Wind River Indian Reservation (Fremont County) | Wind River Energy Commission – Steamboat Butte Fields | WY0033740 | Final | 2020-07-01 | 2025-06-30 |
| Wind River Indian Reservation (Fremont County) | Chemtrade Refinery Services, Inc. | WY0034207 | Final | 2021-01-01 | 2025-12-31 |
| Wind River Indian Reservation (Fremont County) | Eagle Oil and Gas Company – Sheldon Dome Field | WY0020338 | Final | 2015-05-01 | 2020-03-31 |
| Wind River Indian Reservation (Fremont County) | Phoenix Production Company – Sheldon Dome Field | WY0024953 | Final | 2016-09-01 | 2020-03-31 |
| Wind River Indian Reservation (Fremont County) | Wesco Operating, Inc. – Winkleman Dome | WY0025232 | Final | 2016-09-01 | 2020-03-31 |
| Wind River Indian Reservation (Fremont County) | Wesco Operating, Inc. – Sheldon Dome Field | WY0025607 | Final | 2015-05-01 | 2020-03-31 |
| Fremont County | Eagle Bronze Incorporated | WYPF00101 | Final | 2020-09-27 | n/a |
| Sheridan County | L&H Industrial | WYP000019 | Final | 2024-09-24 | n/a |