City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#217
Clyde
County, MI
100 A
#218 Cohasset
County, MN
100 A
#219 Colby
County, KS
100 A
#220 Colchester
County, VT
100 A
#221 Cold Springs
County, CA
100 A
#222 College Place
County, WA
100 A
#223 Colleyville
County, TX
100 A
#224 Collinsville
County, VA
100 A
#225 Cologne
County, MN
100 A
#226 Colonial Heights
County, VA
100 A
#227 Columbus
County, GA
100 A
#228 Commerce
County, GA
100 A
#229 Commerce City
County, CO
100 A
#230 Commerce Township
County, MI
100 A
#231 Concord
County, CA
100 A
#232 Concord
County, MI
100 A
#233 Concord
County, NC
100 A
#234 Concordia
County, KS
100 A
#235 Conklin
County, NY
100 A
#236 Connell
County, WA
100 A
#237 Converse
County, TX
100 A
#238 Coon Rapids
County, IA
100 A
#239 Coopersville
County, MI
100 A
#240 Corcoran
County, CA
100 A
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.