City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#9697
Calumet City
County, IL
52 D
#9698 Colchester
County, IL
52 D
#9699 Dragoon
County, AZ
52 D
#9700 Dudley
County, MA
52 D
#9701 East Aurora
County, NY
52 D
#9702 East Brady
County, PA
52 D
#9703 Fort Hall
County, ID
52 D
#9704 Frenchburg
County, KY
52 D
#9705 Gila Bend
County, AZ
52 D
#9706 Grampian
County, PA
52 D
#9707 Gray
County, ME
52 D
#9708 Groveland
County, FL
52 D
#9709 Harwick
County, PA
52 D
#9710 Ipswich
County, MA
52 D
#9711 Ivins
County, UT
52 D
#9712 Jackson
County, OH
52 D
#9713 Kemp
County, TX
52 D
#9714 Lindenhurst
County, IL
52 D
#9715 Mcfarland
County, CA
52 D
#9716 Mercer
County, PA
52 D
#9717 Monroe
County, NY
52 D
#9718 Morton
County, TX
52 D
#9719 Mount Pleasant
County, IA
52 D
#9720 Nashville
County, NC
52 D
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.