City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10537
Redwater
County, TX
30 F
#10538 Spring City
County, UT
30 F
#10539 Thoreau
County, NM
30 F
#10540 Welch
County, OK
30 F
#10541 Ardmore
County, OK
29 F
#10542 Box Elder
County, SD
29 F
#10543 Canisteo
County, NY
29 F
#10544 Comerio
County, PR
29 F
#10545 Crescent City
County, FL
29 F
#10546 Fredricktown
County, OH
29 F
#10547 Goodwell
County, OK
29 F
#10548 Graford
County, TX
29 F
#10549 Iowa City
County, IA
29 F
#10550 Leadville
County, CO
29 F
#10551 Mcmechen
County, WV
29 F
#10552 Newtown
County, PA
29 F
#10553 Palatka
County, FL
29 F
#10554 Port Byron
County, IL
29 F
#10555 Put-In-Bay
County, OH
29 F
#10556 Rio Grande
County, PR
29 F
#10557 Rockaway
County, NJ
29 F
#10558 West Milford
County, WV
29 F
#10559 Weyauwega
County, WI
29 F
#10560 Benton
County, IL
28 F
Frequently Asked Questions
How are city water quality rankings calculated?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two US cities directly?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.