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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 Exit

Related pages:

Click on the facility/permit name to view the permit and supporting documents.

NPDES Permits issued by EPA in Wyoming
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 2016-01-01 2020-12-31
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 01/01/2008 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) Merit Energy Company – Circle Ridge Field in Wyoming WY0000949 Final 2020-07-01 2025-06-30
Wind River Indian Reservation (Fremont County) Merit Energy Company – 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