See what's actually in the water at your address.
Your ZIP code. Your household. A report built on official EPA data that tells you not just what's legal—but what the science says is safe. Free in 30 seconds, no email required.
FreeNo email required to startUsed by OBs, longevity clinicians, and 12,000+ households
Water Health Check Report · Sample
78704 · South Austin, TX
Austin Water · Colorado River · Updated Mar 2026
Good
2 of 15 contaminants above
EWG health guidelines
| Contaminant | Level | Status |
|---|---|---|
| Total trihalomethanes | 41.7 ppb | Above guideline |
| Haloacetic acids (HAA5) | 26.1 ppb | Above guideline |
| Lead (90th percentile) | < 1.0 ppb | Within limits |
| PFOA | ND | Not detected |
| Nitrate | 0.43 ppm | Within limits |
How it works
What you get—and where it comes from.
Your utility, identified.
Your ZIP maps to the exact water system serving your address—pulled directly from EPA's Safe Drinking Water Information System, the federal record of every public utility in the U.S.
Source: EPA SDWIS
Every contaminant, benchmarked twice.
Each detected compound is compared to both the EPA's legal limit and EWG's stricter health-based guideline—so you see not just what's allowed, but what peer-reviewed toxicology actually recommends.
Includes UCMR5 PFAS results
Findings filtered for who's actually drinking it.
Select who lives in your home—pregnant, infant, immunocompromised, performance-focused—and we surface the contaminants that matter most for each person's biology, ranked by documented risk.
Informed by NTP & IARC classifications
Built for three people
Built for every reason people worry about their water.
For pregnancy and fertility
Chlorination byproducts, nitrates, lead, and PFAS each carry documented risks during pregnancy and early development. Your report surfaces them first—with source citations you can bring directly to your OB or midwife.
Read the pregnancy guide →For longevity and performance
Chronic daily exposure is a variable most longevity protocols ignore. Your report quantifies your water's contaminant load—including emerging compounds UCMR5 has detected but regulators haven't yet restricted.
Read the longevity guide →For clinicians and practitioners
Run a Water Health Check for any patient address. PDF reports are fully citation-linked—designed to enter the clinical conversation, not replace your judgement.
Open the practitioner portal →Sources & methodology
Every number has a source. We name it.
We don't estimate, interpolate, or infer. If a contaminant level isn't in the public federal record, your report says so—explicitly. No gaps dressed up as clean data.
Read full methodology →Safe Drinking Water Information System—the federal database of all public water system violations and monitoring results. Updated quarterly.
Unregulated Contaminant Monitoring Rule 5—the most comprehensive PFAS dataset in public water ever compiled, released 2023–2025.
EWG health-based guidelines are used as comparison benchmarks only—stricter than EPA limits, derived from peer-reviewed toxicology.
Select states publish supplementary monitoring data beyond federal requirements. We incorporate these where available.
In clinical practice
How clinicians are using it.
These are the use cases practitioners have built around WaterHealthCheck. Citation-linked PDFs are designed to enter clinical charts—not replace clinical judgement.
Open practitioner portal →OB · Midwifery
First-trimester environmental intake
Cross-referenced with ZIP-level contaminant data at the initial visit. Flags lead, nitrate, and PFAS before dietary counselling begins.
Naturopathic · Integrative medicine
New-patient environmental load assessment
Run at intake alongside the lifestyle questionnaire. Establishes water quality as a documented input in the patient chart.
Longevity · Environmental medicine
Environmental pillar of longevity protocols
Quantifies chronic daily exposure to unregulated compounds. Feeds directly into the environmental medicine workup.
Free · No email required · 30 seconds
Your address. Your household. Your water.
The same data EWG publishes—personalised for the people in your home, not just your utility district. Free, source-linked, no email required to start.