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 This website is no longer updated and links to external websites and some internal pages may not work.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

The way you label your water samples tells EPA Region 8 a lot about the sample, whether you mean it to or not. It also determines whether your sample results will be credited to your water system, or if you end up with a monitoring violation if the correct sampling location is not clearly indicated. This article explains how to clearly and correctly label your drinking water samples in order to receive the credit you deserve.

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