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 This website is no longer updated and links to external websites and some internal pages may not work.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

Drinking Water Requirements for States and Public Water Systems

Total Coliform Rule Distribution System Advisory Committee (TCRDSAC) Document

This document provide information about the TCRDSAC, including its charter, processes and recommendations. The Agency used the Advisory Committee recommendations to develop proposed and final rules that revised the Total Coliform Rule.

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