City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2305
Coldwater
County, OH
96 A
#2306 College Station
County, TX
96 A
#2307 Coloma
County, MI
96 A
#2308 Colony
County, KS
96 A
#2309 Columbiana
County, AL
96 A
#2310 Columbus
County, MT
96 A
#2311 Columbus
County, TX
96 A
#2312 Comer
County, GA
96 A
#2313 Coppell
County, TX
96 A
#2314 Copperas Cove
County, TX
96 A
#2315 Cornell
County, WI
96 A
#2316 Cotuit
County, MA
96 A
#2317 Craryville
County, NY
96 A
#2318 Crested Butte
County, CO
96 A
#2319 Crestline
County, OH
96 A
#2320 Crookston
County, MN
96 A
#2321 Cropwell
County, AL
96 A
#2322 Cuero
County, TX
96 A
#2323 Cumberland
County, MD
96 A
#2324 Custer
County, SD
96 A
#2325 Daingerfield
County, TX
96 A
#2326 Dannemora
County, NY
96 A
#2327 Dassel
County, MN
96 A
#2328 Davis
County, WV
96 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.