City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1417
Colton
County, CA
98 A
#1418 Columbia
County, MD
98 A
#1419 Columbus
County, KS
98 A
#1420 Concho
County, OK
98 A
#1421 Conover
County, NC
98 A
#1422 Conrad
County, MT
98 A
#1423 Coon Rapids
County, MN
98 A
#1424 Coopersburg
County, PA
98 A
#1425 Copeville
County, TX
98 A
#1426 Corte Madera
County, CA
98 A
#1427 Covington
County, GA
98 A
#1428 Covington
County, OH
98 A
#1429 Covington
County, TN
98 A
#1430 Cowan
County, TN
98 A
#1431 Coxs Creek
County, KY
98 A
#1432 Crawford
County, TX
98 A
#1433 Creighton
County, NE
98 A
#1434 Creston
County, OH
98 A
#1435 Cromwell
County, CT
98 A
#1436 Crossett
County, AR
98 A
#1437 Crowley
County, TX
98 A
#1438 Cumberland
County, RI
98 A
#1439 Dane
County, WI
98 A
#1440 Davenport
County, WA
98 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.