City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11209
Chapmanville
County, WV
0 F
#11210 Charenton
County, LA
0 F
#11211 Chariton
County, IA
0 F
#11212 Chatham
County, LA
0 F
#11213 Chattanooga
County, OK
0 F
#11214 Checotah
County, OK
0 F
#11215 Chenoa
County, IL
0 F
#11216 Cheraw
County, SC
0 F
#11217 Chickasha
County, OK
0 F
#11218 Choctaw
County, OK
0 F
#11219 Cimarron
County, NM
0 F
#11220 Cisco
County, TX
0 F
#11221 Citronelle
County, AL
0 F
#11222 Clarendon
County, AR
0 F
#11223 Clayton
County, OK
0 F
#11224 Clifton
County, TN
0 F
#11225 Clinton
County, OK
0 F
#11226 Clyde
County, TX
0 F
#11227 Coahoma
County, TX
0 F
#11228 Coalgate
County, OK
0 F
#11229 Coffeyville
County, OK
0 F
#11230 Colbert
County, OK
0 F
#11231 Colorado City
County, CO
0 F
#11232 Columbus
County, NC
0 F
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.