City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10009
Carbondale
County, KS
52 D
#10010 Cedaredge
County, CO
52 D
#10011 Chrisman
County, IL
52 D
#10012 Colchester
County, IL
52 D
#10013 Coral Springs
County, FL
52 D
#10014 Dolan Springs
County, AZ
52 D
#10015 Dragoon
County, AZ
52 D
#10016 Duchesne
County, UT
52 D
#10017 Elm Grove
County, LA
52 D
#10018 Fort Sumner
County, NM
52 D
#10019 Frisco
County, CO
52 D
#10020 Ft. Pierce
County, FL
52 D
#10021 Gould
County, OK
52 D
#10022 Grampian
County, PA
52 D
#10023 Griswold
County, IA
52 D
#10024 Groveland
County, FL
52 D
#10025 Henrietta
County, TX
52 D
#10026 Hohokus Boro
County, NJ
52 D
#10027 Iraan
County, TX
52 D
#10028 Ivins
County, UT
52 D
#10029 Kalona
County, IA
52 D
#10030 Lake Waccamaw
County, NC
52 D
#10031 Lansing
County, IL
52 D
#10032 Lindenhurst
County, IL
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.