NPDES General Permit Web Inventory

NPDES General Permit Web Inventory

The NPDES General Permit Inventory search tool allows users to search for NPDES general permits by permit number, permit name, state, EPA Region, date issued, date expired, or permit category. Search results display basic permit information, as well as a link to electronic permit documents when available.

Because this is an ongoing effort, the search engine below may not include all general permits. If you are unable to find a permit or would like more information on a specific permit in the inventory, contact your permitting authority for assistance.

EPA’s general permits cover discharges in areas where EPA is the NPDES permitting authority, which includes four states (Idaho, Massachusetts, New Hampshire, and New Mexico), Washington, D.C., all U.S. territories except the Virgin Islands, most Indian Country lands, federal facilities in four additional states (Colorado, Delaware, Vermont, and Washington), and a few additional areas as specified on the Specific State Program Status page. All other states have the authority to issue general permits.

The information in this inventory is obtained from PMOS, EPA Regional offices, and states and is updated semi-annually. The information in this inventory is current as of October 2019.

If you have any questions about this web inventory, or would like to report any data errors, please contact Jackie Clark.


Search for NPDES Permits

Permit Information