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 This website is no longer updated and links to external websites and some internal pages may not work.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

Water Research Fact Sheets

On this page:

Program Overviews

Top of Page

Drinking Water

Overviews

Treatment and Optimization

Lead

Source Water

Top of Page

Per-and Polyfluoroalkyl Substances (PFAS)

Top of Page

Nutrients and Harmful Algal Blooms (HABs)

Top of Page

Water Quality and Recreational Water

Top of Page

Aquatic Species and Chemical Toxicity

Top of Page

Water Reuse/Reclaimed Water/Conservation

Top of Page

Ecosystem Services/Restoration

Top of Page

Stormwater Management/Watershed Management

Overviews

Research Sites

Models and Tools

Top of Page