About
About WaterHealthCheck
WaterHealthCheck is a free water quality report tool built on public federal data. Enter a ZIP code. Get a readable, source-linked report on what your water utility has detected — calibrated for who's drinking it.
Why it exists
The data was always there.
EPA's Safe Drinking Water Information System contains monitoring results for every public water utility in the United States. UCMR5 contains the most comprehensive PFAS dataset ever assembled for public water. Both are free, public, and updated regularly.
They're also buried in federal databases, encoded in formats designed for regulatory compliance — not for the person making breakfast. WaterHealthCheck pulls from the same sources regulators use and presents that data in a form ordinary people can actually read and act on.
No estimates. No interpolation. If a measurement doesn't exist in the public record, we say so rather than filling the gap.
Independence
Neutral by design.
WaterHealthCheck does not sell water filters. We do not take affiliate commissions. We do not have relationships with filter manufacturers.
The filter recommendations in reports are generated from the contaminant profile — not from commercial partnerships. The same report might recommend a reverse osmosis system for one household and a basic carbon filter for another, depending entirely on what's in the water.
This is not a product funnel. It's a data tool that happens to have a filter recommendation layer.
Data sources
Where the numbers come from.
Safe Drinking Water Information System
The federal database of all U.S. public water system violations and monitoring results. Updated quarterly. Every public utility in the country is in it.
Unregulated Contaminant Monitoring Rule 5
The most comprehensive PFAS dataset in public water ever compiled, released 2023–2025. We incorporate the full PFAS monitoring results where available.
EWG Health Guidelines
Used as secondary benchmarks only — stricter than EPA limits, derived from peer-reviewed toxicology. We show both so you can see the full picture.
State Supplementary Data
Select states publish supplementary monitoring beyond federal requirements. We incorporate these where available — California, Massachusetts, New Jersey, and others.
Full methodology, scoring, and update cadence: read the methodology page.
Who uses it
Anyone who wants to know.
Chlorination byproducts, nitrates, lead, and PFAS carry documented risks in pregnancy. Surfacing those contaminants clearly — with citations — is something that matters.
Infants mixing formula are especially vulnerable to nitrates, lead, and fluoride at certain levels. Reports can be calibrated for infant exposure specifically.
Chronic daily exposure to low-level contaminants is an underexamined variable. Biohackers and longevity-focused individuals use reports to close that gap.
Which is most of us. The data has always been public — it just wasn't readable.
Free · No account required · 30 seconds
Check your water.
Enter your ZIP code and see what's in your utility's water — source-linked, personalised for your household, always free.
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