City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3193
Connersville
County, IN
94 A
#3194 Conroe
County, TX
94 A
#3195 Conway
County, NH
94 A
#3196 Corona
County, CA
94 A
#3197 Corydon
County, IN
94 A
#3198 Cotati
County, CA
94 A
#3199 Cottage Grove
County, MN
94 A
#3200 Cottekill
County, NY
94 A
#3201 Cottonwood
County, CA
94 A
#3202 Covina
County, CA
94 A
#3203 Crane
County, IN
94 A
#3204 Cranfils Gap
County, TX
94 A
#3205 Crestline
County, CA
94 A
#3206 Cross Plains
County, WI
94 A
#3207 Crossville
County, TN
94 A
#3208 Crystal City
County, TX
94 A
#3209 Crystal Falls
County, MI
94 A
#3210 Cudahy
County, WI
94 A
#3211 Dacono
County, CO
94 A
#3212 Dakota City
County, NE
94 A
#3213 Daleville
County, IN
94 A
#3214 Darrington
County, WA
94 A
#3215 Davis
County, CA
94 A
#3216 Decorah
County, IA
94 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.