City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10801
Turnersville
County, NJ
29 F
#10802 West Union
County, WV
29 F
#10803 Weyauwega
County, WI
29 F
#10804 Altamont
County, IL
28 F
#10805 Calumet Park
County, IL
28 F
#10806 Carlsbad
County, NM
28 F
#10807 Childress
County, TX
28 F
#10808 Christopher
County, IL
28 F
#10809 Crescent City
County, FL
28 F
#10810 Franklin
County, WV
28 F
#10811 Grayson
County, LA
28 F
#10812 Johnstown
County, PA
28 F
#10813 Kewanee
County, IL
28 F
#10814 Kings Island
County, OH
28 F
#10815 La Harpe
County, IL
28 F
#10816 Laneville
County, TX
28 F
#10817 Marietta
County, OK
28 F
#10818 Mexico Beach
County, FL
28 F
#10819 Milesburg
County, PA
28 F
#10820 Mineral Point
County, PA
28 F
#10821 Pompano Beach
County, FL
28 F
#10822 Scituate
County, MA
28 F
#10823 Wayne
County, OK
28 F
#10824 Zephyrhills
County, FL
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.