Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Section 401 of the Clean Water Act

Section 401 Certification

The Clean Water Act (CWA) gives states and authorized tribes the authority to grant, deny, or waive certification of proposed federal licenses or permits that may discharge into waters of the United States. Learn more about 401 certification.

CWA Section 401

About the Process

Press Releases

EPA Issues Final Rule to Strengthen Water Protections, Support Clear and Timely Reviews of Infrastructure and Development Projects (September 2023)