About
About WaterHealthCheck
WaterHealthCheck is a free water quality tool built on public federal data — EPA SDWIS, UCMR5, and supplementary state monitoring. Enter a ZIP code and see exactly what your water utility has detected, how those levels compare to both legal limits and peer-reviewed health guidelines, and what it means for the people in your household.
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 drinking water. Both are free, publicly available, and updated on a federal schedule.
They're also buried in regulatory databases—formatted for compliance officers, not for the person deciding what to give their infant or what to put in their morning coffee.
WaterHealthCheck was built to fix that. We pull from the same sources regulators use and present them in a form people can actually read, act on, and bring into a clinical conversation.
No estimates. No interpolation. If a measurement doesn't exist in the public record, your report says so explicitly—rather than presenting absence of data as evidence of clean water.
Independence
Neutral by design.
WaterHealthCheck does not sell water filters or water treatment products. We take no affiliate commissions on filter purchases.
Where a report identifies contaminants above health guidelines, it notes which filter technologies are documented to address them—based on NSF certification standards and published removal data, not on commercial relationships. The contaminant profile drives the output.
The data is neutral. What you do with it is up to you.
For households that want to go further—to understand their options and get a recommendation specific to their water profile—reports link to an independent water wellness consultation. That consultation is free and carries no obligation to purchase anything.
Who built it
Who built it.
WaterHealthCheck was built by Aimee Devlin.
The data methodology, scoring logic, and contaminant benchmarks are drawn entirely from public federal sources—EPA SDWIS, UCMR5, and EWG health guidelines. The tool produces the same output for every address, regardless of what a user does with the results.
Aimee also runs Drawn Health, an independent water wellness consultancy. Where WaterHealthCheck reports suggest further action, they link to a free Drawn Health consultation. That relationship is disclosed here and on every page where the referral appears.
The tool is neutral. The referral is transparent. Both things are true at the same time.
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.
The team
Why this exists.
WaterHealthCheck was built because the data gap wasn't a data problem—it was a design and accessibility problem. The federal record is genuinely comprehensive. What was missing was a layer between the regulatory database and the person who needed to understand it.
The tool is maintained by a small team focused on water quality data and environmental health. We update the underlying data on the federal release schedule and publish our methodology in full.
Read the full methodology →Who it's built for
Who it's built for.
Chlorination byproducts, nitrates, lead, and PFAS each carry peer-reviewed documentation of risk during pregnancy and early development. The problem isn't that this data is hidden—it's that it arrives as a utility compliance report, formatted for regulators, not for a 28-year-old in her first trimester trying to make a decision at 11pm.
WaterHealthCheck surfaces pregnancy-relevant contaminants first, benchmarks them against the strictest available health guidelines, and links every figure to its source—so you have something you can actually bring to your OB or midwife.
Infants consuming formula mixed with tap water face different risk thresholds than adults. Nitrates pose specific risk for infants under six months. Lead exposure in early development has no established safe level. Fluoride recommendations for infants differ from adult guidelines.
Reports can be calibrated for infant exposure specifically—surfacing the contaminants that carry documented developmental risk, at the concentrations that matter for a small body.
Chronic daily exposure to low-level contaminants is a variable most longevity and performance protocols don't account for—not because the data doesn't exist, but because no one has made it accessible in a form that fits the way these decisions get made.
Your report quantifies your water's full contaminant profile, including emerging compounds detected in UCMR5 monitoring that regulators haven't yet set limits for. If you're optimising everything else, this is the gap.
Environmental health factors—including drinking water quality—are an underexamined variable in clinical practice, partly because the data is hard to access and harder to interpret at the point of care.
WaterHealthCheck reports are fully citation-linked and formatted to enter a clinical conversation, not replace it. A practitioner can run a report for any patient address in the U.S., download a PDF with sourced contaminant data, and use it as one input among many—without navigating federal databases themselves.
Free · No account required · 30 seconds
Check your water.
Enter your ZIP code. See what's in your utility's water—every number sourced, personalised for your household, always free.
Check your water →