City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5305
Cleveland
County, TX
88 B
#5306 Clute
County, TX
88 B
#5307 Cobb
County, CA
88 B
#5308 Colorado Springs
County, CO
88 B
#5309 Columbia City
County, IN
88 B
#5310 Columbus
County, MS
88 B
#5311 Columbus
County, WI
88 B
#5312 Cooperstown
County, NY
88 B
#5313 Cornelia
County, GA
88 B
#5314 Cortez
County, CO
88 B
#5315 Cortland
County, OH
88 B
#5316 Coventry
County, CT
88 B
#5317 Crazy Horse
County, SD
88 B
#5318 Crosby
County, MN
88 B
#5319 Crownpoint
County, NM
88 B
#5320 Culbertson
County, MT
88 B
#5321 Cut Bank
County, MT
88 B
#5322 Dalhart
County, TX
88 B
#5323 Darien
County, IL
88 B
#5324 Dawson Springs, Ky 42408
County, KY
88 B
#5325 Degraff
County, OH
88 B
#5326 Del City
County, OK
88 B
#5327 Delano
County, MN
88 B
#5328 Delavan
County, WI
88 B
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.