An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

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 Pollutant Discharge Elimination System Wastewater Permits Exit

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