City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7921
Denver
County, IA
76 B
#7922 Derby
County, KS
76 B
#7923 Des Moines
County, IA
76 B
#7924 Diamondhead
County, MS
76 B
#7925 Dodge City
County, KS
76 B
#7926 Dover
County, KY
76 B
#7927 Dyer
County, AR
76 B
#7928 Earle
County, AR
76 B
#7929 East Aurora
County, NY
76 B
#7930 East Brookfield
County, MA
76 B
#7931 Edinburg
County, VA
76 B
#7932 Edison
County, GA
76 B
#7933 Effingham
County, IL
76 B
#7934 Elberta
County, AL
76 B
#7935 Ellenburg Depot
County, NY
76 B
#7936 Erie
County, PA
76 B
#7937 Fairless Hills
County, PA
76 B
#7938 Fontana
County, WI
76 B
#7939 Freeland
County, MI
76 B
#7940 Fritch
County, TX
76 B
#7941 Geneva
County, IN
76 B
#7942 Gibsonville
County, NC
76 B
#7943 Gilbertville
County, MA
76 B
#7944 Glendale Heights
County, IL
76 B
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.