Public water records, made legible
Understand the evidence behind your water.
Enter your address, city, ZIP, or water system. We find the utility that serves you, read its public record, and show every measurement against the limit set to protect you.
Try Phoenix, 85001, or Tucson Water.
Explore the national mapHow PurityMap works
Four steps from your address to the evidence
Every profile is assembled the same way, in the open. Nothing is scored by a model we can’t show you.
Find the supplier
Turn an address, city, or ZIP into the public water system that actually serves it.
Read public records
Pull that system's Consumer Confidence Report and state SDWIS monitoring.
Compare with benchmarks
Read each measured value against its enforceable federal limit and health goal.
Inspect the evidence
Trace every number back to its source document, method, and sample date.
What a search returns
NEW YORK CITY SYSTEM
New York, NY · surface water (primary source of record in epa sdwis). · serves 8,271,000 people
86/100Good
Its lead (90th percentile) reads 10 µg/L, under the 15 µg/L federal limit. Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonic acid (PFOS) come back non-detect.
Popular places
Two ways in: by state, or by city
Start wide with a statewide report, or drop straight onto a city and the exact system that serves it.
Browse by state
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View all citiesPopular contaminants
Start with the ones people ask about
Honest by design
What public records can and can’t tell you
We show the record faithfully, including where it goes quiet. That line matters more than a reassuring score.
- Which public system serves your address, city, or ZIP.
- Every contaminant that was measured, against its federal limit.
- The exact source document and date behind each value.
- How your system compares to others on the same evidence.
- Exactly what’s flowing from your specific tap right now.
- Anything about a contaminant that was never sampled.
- A substitute for a certified in-home water test.
- Changes since the utility’s last published report.
Recent guides from the Journal
Cities Where PFAS Exceeds the 2024 Federal Limit
Federal 2024 monitoring found PFOS above the new 4.0 ng/L limit in 665 monitored cities. Here is what the records show and how to read them.
Cities Where Lead Exceeds the Federal Action Level
Federal monitoring recorded lead above the 15 µg/L action level in 26 cities. Here is what that number means, and what it does not.
Best PFAS Water Filter Formats Compared (2026)
Pitcher, countertop, under-sink or whole-house? A plain comparison of the filter formats certified to reduce PFAS, and which situation each one fits.
Trust & methodology