City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#241
Corcoran
County, MN
100 A
#242 Cord
County, AR
100 A
#243 Cordova
County, AL
100 A
#244 Cosby
County, MO
100 A
#245 Costa Mesa
County, CA
100 A
#246 Cottonwood
County, MN
100 A
#247 Coulee Dam
County, WA
100 A
#248 Covert
County, MI
100 A
#249 Coward
County, SC
100 A
#250 Cowarts
County, AL
100 A
#251 Cozad
County, NE
100 A
#252 Craigsville
County, VA
100 A
#253 Crawfordsville
County, AR
100 A
#254 Crete
County, NE
100 A
#255 Crossville
County, AL
100 A
#256 Crystal
County, MN
100 A
#257 Cumberland
County, VA
100 A
#258 Cumberland
County, WI
100 A
#259 Cut And Shoot
County, TX
100 A
#260 Cutten
County, CA
100 A
#261 Dakota Dunes
County, SD
100 A
#262 Dalton Gardens
County, ID
100 A
#263 Dalworthington Gardens
County, TX
100 A
#264 David City
County, NE
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.