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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Infographic: How EPA develops drinking water regulations

Understanding how EPA develops new drinking water regulations

EPA works to ensure that drinking water is safe by developing National Primary Drinking Water Regulations.  Learn more about the development process through the infographic provided below.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.