TapWaterData is a free, independent website that helps people understand what is in their tap water. Enter a ZIP code or city and you get a plain-English report on your local water system, built from public records: EPA Safe Drinking Water Information System (SDWIS) data, utilities' annual Consumer Confidence Reports, and federal contaminant monitoring such as UCMR 5 PFAS testing.We cover more than 18,000 US cities and the utilities that serve them. Each report shows which contaminants were detected, how the levels compare with EPA legal limits and health-based guidelines, recent violations, and water hardness, with a link back to the source so you can check the numbers yourself.Our approach is science-based and calm. We do not use scare tactics. Most US tap water meets federal standards, and when it doesn't, we say so clearly and explain what it means for your household.When treatment makes sense, we recommend only filters whose claims are independently certified (NSF/ANSI, WQA or IAPMO) for the specific contaminants found in your water, and we check those claims against the certifiers' own listings. Some product links are affiliate links; this never changes which products we recommend, and it keeps the site free.We also publish guides on well water, water hardness, lead in school drinking water, boil-water advisories, and how to read a water quality report. Found an error? Tell us at [email protected] and we'll correct it.
TapWaterData (tapwaterdata.com) has 4 customer reviews on Five Star Index, with an average rating of 5.0 out of 5.
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- tapwaterdata.com
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- 2026