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Oklahoma NPDES Permits

In Oklahoma, EPA issues NPDES permits on tribal lands. For more information, please contact EPA Region 6. All other permits are issued by the Oklahoma Dept. of Environmental Quality.

For state-issued permits, visit Oklahoma Dept. of Environmental Quality Wastewater & Stormwater

For stormwater permits, visit NPDES Stormwater Program in Region 6.

NPDES Permits Issued by EPA in Oklahoma
Location	Facility or Permit Name	Permit Number	Effective Date	Expiration Date
Durant	Choctaw Nation of Oklahoma WWTP - Hochatown	OK0046087	08-01-2022	09-30-2027
Harrah	Kickapoo Casino Harrah Wastewater Treatment Plant	OK0044733	08-01-2023	09-30-2028
General Permit	Discharges From Hydrostatic Testing of New and Existing Vessels in Oklahoma (OKG27F000)	OKG27F000 OKG27I000	04-15-2023	04-14-2028