Explore water quality across the country
PurityMap turns public drinking-water records into one connected system: a place, the utility that serves it, each measurement it reported, how that compares to the limit, and the evidence behind it. Start with your water.
One place, three kinds of record
PurityMap keeps them separate. A city's record is not the water at your tap.
- 01Place report
A city or county
A summary for where you live, assembled from the utility (or utilities) that serve it. The best place to start when you know the town but not the water system.
e.g. New York City - 02Supplier report · primary source
A water system
The utility's own monitoring record: the substances it tested for, the results it reported, and how each compares to its regulatory limit. Place reports are built from it.
e.g. NEW YORK CITY SYSTEM · NY7003493 - 03Your tap · not in the record
What we can't see
Records describe the water a utility delivers to the system, not your building's pipes or fixtures. Only a test at your own tap measures that. We tell you which, always.
How to test your tap →
Find your way into the data
Water quality by state
- Alabama128 cities
- Alaska3 cities
- Arizona36 cities
- Arkansas53 cities
- California341 cities
- Colorado92 cities
- Connecticut20 cities
- Delaware9 cities
- District of Columbia1 city
- Florida180 cities
- Georgia120 cities
- Hawaii11 cities
- Idaho21 cities
- Illinois193 cities
- Indiana71 cities
- Iowa37 cities
- Kansas30 cities
- Kentucky75 cities
- Louisiana66 cities
- Maine11 cities
- Maryland29 cities
- Massachusetts163 cities
- Michigan131 cities
- Minnesota93 cities
- Mississippi44 cities
- Missouri63 cities
- Montana10 cities
- Nebraska15 cities
- Nevada12 cities
- New Hampshire16 cities
- New Jersey139 cities
- New Mexico28 cities
- New York122 cities
- North Carolina127 cities
- North Dakota8 cities
- Ohio115 cities
- Oklahoma43 cities
- Oregon64 cities
- Pennsylvania99 cities
- Rhode Island13 cities
- South Carolina71 cities
- South Dakota15 cities
- Tennessee143 cities
- Texas364 cities
- Utah66 cities
- Vermont8 cities
- Virginia60 cities
- Washington115 cities
- West Virginia17 cities
- Wisconsin89 cities
- Wyoming12 cities
Find the water system behind your tap
Start from an address, city or ZIP. Every report links to its public source.