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 This website is no longer updated and links to external websites and some internal pages may not work.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

Draft Human Health Water Quality Criteria and Technical Support Documents

Pollutants can harm people’s health when they drink water or eat seafood from contaminated surface water. EPA scientists research how much of a specific chemical can be present in surface water before it is likely to harm human health. Based on this research, EPA develops human health criteria.

Draft Documents: