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Wyoming NPDES Permits

In Wyoming, 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 Wyoming Dept. of Environmental Quality.

For state-issued permits, visit Wyoming Pollutant Discharge Elimination System Program Exit


Final and draft permits

The table below contains all final (i.e. active) and draft (i.e. proposed) NPDES permits issued by EPA within Wyoming. It includes permits for individual facilities, general permits, and stormwater permits. Click on the facility/permit name to view the permit and supporting documents.

Wyoming NPDES Permits
Location Facility or Permit Name Permit Number Permit Type Permit Status Effective Date
Various Wastewater Lagoons in Indian Country WYG589### General Final 01/01/2016
Wind River Indian Reservation (Fremont County) Wesco Operating, Inc. – Lander Field WY0000221 Individual Final 11/01/2017
Wind River Indian Reservation (Fremont County) Wesco Operating, Inc. – Maverick Springs WY0000469 Individual Final 01/01/2008
Wind River Indian Reservation (Fremont County) Marathon Oil Company – Maverick Springs WY0000779 Individual Final  
Wind River Indian Reservation (Fremont County) Marathon Oil Company – Chatterton Battery WY0000922 Individual Final  
Wind River Indian Reservation (Fremont County) Marathon Oil Company – Circle Ridge WY0000949 Individual Final  
Wind River Indian Reservation (Fremont County) Marathon Oil Company – Steamboat Butte Fields WY0033740 Individual Final  
Wind River Indian Reservation (Fremont County) Shoshone Utility Organization WY0044580 Individual Final  
Wind River Indian Reservation (Fremont County) Devon Energy Production Company, L.P. – Riverton Dome WY0000671 Individual Final  
Wind River Indian Reservation (Fremont County) Chemtrade Refinery Services, Inc. WY0034207 Individual Final 05/01/2010
Wind River Indian Reservation (Fremont County) Eagle Oil and Gas Company – Sheldon Dome Field WY0020338 Individual Final 05/01/2015
Wind River Indian Reservation (Fremont County) Phoenix Production Company – Rolff Lake Unit WY0024945 Individual Final 05/01/2015
Wind River Indian Reservation (Fremont County) Phoenix Production Company – Sheldon Dome Field WY0024953 Individual Final 05/01/2015
Wind River Indian Reservation (Fremont County) Wesco Operating, Inc. – Winkleman Dome WY0025232 Individual Final 05/01/2015
Wind River Indian Reservation (Fremont County) Wesco Operating, Inc. – Sheldon Dome Field WY0025607 Individual Final 05/01/2015