National Pollutant Discharge Elimination System (NPDES)
What is NPDES?
The NPDES permit program addresses water pollution by regulating point sources that discharge pollutants to waters of the United States.
Created in 1972 by the Clean Water Act, the NPDES permit program is authorized to state governments by EPA to perform many permitting, administrative, and enforcement aspects of the program.
NPDES Around the Nation
New Draft Guidance for Future NPDES CSO Permits
Open for public comment through March 21, 2024
Join NPDES News to receive updates on webinars, training, and publications.
New and Notable
- Stormwater Centers of Excellence Grants
- NPDES Program Policy Addressing Environmental Justice and Equity in the NPDES Permit Program
- Case Studies of Successful Approaches to Off-Site Stormwater Management
- Understanding Nutrient Management Plans Learning Modules
- Off-Site Stormwater Management MS4 Compendium: Compendium Part 7: Off-Site Stormwater Management (pdf)
- Off-Site Stormwater Management
- Addressing PFAS Discharges in NPDES Permits and Through the Pretreatment Program and Monitoring Programs (pdf)
- Low Flow Statistics Tools Handbook
- FAQs for Control Authorities on Dental Rule
- Online Training: Permit Writing Tips and Best Practices
- Compendium of State Approaches for Manure Management
- MS4 General Permit Remand Rule
- Public Participation in the NPDES Permit Issuance Process (pdf)