EPA issues all National Pollutant Discharge Elimination SystemNational Pollutant Discharge Elimination SystemA national program under Section 402 of the Clean Water Act for regulation of discharges of pollutants from point sources to waters of the United States. Discharges are illegal unless authorized by an NPDES permit. (NPDES) water quality permits in Idaho, Massachusetts, New Hampshire, New Mexico, the District of Columbia (Washington, D.C.), U.S. territories, and on federal and tribal lands. Other states have been delegated by EPA to issue their own permits. Learn more about EPA's NPDES program.

Find a NPDES Permit

• Wastewater permits.
• Stormwater permits.
• General permits for industries such as aquaculture, mining, and pesticide applications.

• Western and Central Gulf of Mexico Offshore Oil & Gas NPDES Program
• Eastern Gulf of Mexico Offshore Oil & Gas NPDES Permits