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.

Contact Us About the CCL and Regulatory Determinations

Do you have a comment or question regarding drinking water?

Please use our online form to send us comments or questions. Be sure to include your e-mail address to receive a response.
Note: If your comment is related to a specific web page, please include the link or URL.

Mailing Address:
EPA Office of Ground Water and Drinking Water
1200 Pennsylvania Ave, N.W.
Mail Code 4607M
Washington, DC 20460

Contact Us About the CCL and Regulatory Determinations

Do you have a comment or question regarding drinking water?

Contaminant Candidate List (CCL) and Regulatory Determination