City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3169
Chesapeake Beach
County, MD
94 A
#3170 Chesterfield
County, IN
94 A
#3171 Chetek
County, WI
94 A
#3172 China
County, TX
94 A
#3173 China Lake
County, CA
94 A
#3174 Chisholm
County, MN
94 A
#3175 Church Hill
County, TN
94 A
#3176 Cimarron
County, KS
94 A
#3177 Claremont
County, NC
94 A
#3178 Clayton
County, IL
94 A
#3179 Clear Lake
County, IA
94 A
#3180 Cleveland
County, TN
94 A
#3181 Clinton
County, SC
94 A
#3182 Coal Hill
County, AR
94 A
#3183 Cochran
County, GA
94 A
#3184 Cold Spring
County, MN
94 A
#3185 Colebrook
County, NH
94 A
#3186 Columbia
County, IL
94 A
#3187 Columbia
County, MO
94 A
#3188 Columbia
County, TN
94 A
#3189 Columbia Falls
County, MT
94 A
#3190 Columbus
County, NE
94 A
#3191 Columbus
County, NJ
94 A
#3192 Columbus Afb
County, MS
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.