KnowYourExposure shows what is in your tap water by ZIP code: free water quality reports for over 18,000 US cities covering PFAS, lead, and EPA-regulated contaminants, with 10-year trends and filter recommendations. Built on public EPA data.
Water, Air, Radon & Lead Reports by ZIP | KnowYourExposure
Free exposure report for any US ZIP: tap water (lead & PFAS), radon risk, lead paint, and air quality. Official EPA, CDC

Water, Air, Radon & Lead Reports by ZIP | KnowYourExposure Introduction
Key Features
- Water reports for 18,000+ US cities, PFAS and lead data, 10-year trends, filter recommendations, free
Use Cases
- Checking tap water safety by ZIP; tracking contaminant trends; choosing a water filter
Why Startups Use It
People cannot see what is in their tap water; KnowYourExposure turns public EPA data into a free report for any ZIP code.
Alternative Options
EWG tap water database; EPA consumer confidence reports
More About Water, Air, Radon & Lead Reports by ZIP | KnowYourExposure
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Listed DateSep 30, 2026
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