What’s in your water?
Discover the most common contaminants in your tap water and learn how they compare to critical health standards.
Enter your zip code to see the specific contaminants in your tap water, how they can affect you, and how to best protect yourself and your family.

Most commonly found contaminants

PFAS
Risk of potential exposure
High filter effectivness
Very low exposure to some PFAS chemicals has been linked to cancer, thyroid disease, weakened childhood immunity and many other health problems.
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PFAS contamination in the U.S.
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Popular locations

New york
New York city system
8
Contaminants exceed EWG health guidelines
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Los Angeles
Department of water and power
6
Contaminants exceed EWG health guidelines
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Chicago
City of Chicago
8
Contaminants exceed EWG health guidelines
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Includes chemicals detected in 2017-2019 for which annual utility averages exceeded an EWG-selected ...
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