An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Certification of Laboratories for Drinking Water

Contact Us About Certification of Laboratories for Drinking Water

Report an environmental violation
Report a Violation
Report possible violations of environmental laws and regulations.

If you want to have your drinking water tested find a certified laboratory in your state or territory.

Please use the form below to send us comments or questions. Be sure to include your e-mail address if you’d like a response.

Mailing Address:

U.S. EPA Office of Ground Water and Drinking Water
26 West Martin Luther King Drive
Mail Stop-140
Cincinnati, OH 45268

Certification of Laboratories for Drinking Water