City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11233
Comfort
County, TX
0 F
#11234 Converse
County, LA
0 F
#11235 Cookson
County, OK
0 F
#11236 Cooper City
County, FL
0 F
#11237 Coralville
County, IA
0 F
#11238 Cordell
County, OK
0 F
#11239 Cordova
County, AK
0 F
#11240 Corning
County, IA
0 F
#11241 Corydon
County, IA
0 F
#11242 Coudersport
County, PA
0 F
#11243 Council Hill
County, OK
0 F
#11244 Craig
County, AK
0 F
#11245 Creech Afb
County, NV
0 F
#11246 Cresco
County, IA
0 F
#11247 Crewe
County, VA
0 F
#11248 Crowder
County, OK
0 F
#11249 Cuba
County, NM
0 F
#11250 Cutler
County, CA
0 F
#11251 Danville
County, AR
0 F
#11252 Danville
County, KY
0 F
#11253 Davidsville
County, PA
0 F
#11254 Davis
County, OK
0 F
#11255 De Leon
County, TX
0 F
#11256 Decatur
County, AR
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.