City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8689
Charleston
County, WV
70 C
#8690 Chelsea
County, OK
70 C
#8691 Clarksburg
County, WV
70 C
#8692 Clayton
County, NJ
70 C
#8693 Clio
County, AL
70 C
#8694 Clyde
County, NY
70 C
#8695 Connellsville
County, PA
70 C
#8696 Corrigan
County, TX
70 C
#8697 Cortland
County, IL
70 C
#8698 D'Iberville
County, MS
70 C
#8699 Danville
County, PA
70 C
#8700 Earlham
County, IA
70 C
#8701 Eastland
County, TX
70 C
#8702 Ellettsville
County, IN
70 C
#8703 Ewing
County, KY
70 C
#8704 Faison
County, NC
70 C
#8705 Farmersville
County, TX
70 C
#8706 Forsyth
County, MO
70 C
#8707 Georgetown
County, TN
70 C
#8708 Gregory
County, SD
70 C
#8709 Guy
County, AR
70 C
#8710 Guymon
County, OK
70 C
#8711 Harleton
County, TX
70 C
#8712 Harriman
County, NY
70 C
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.