City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#193
Charlotte
County, MI
100 A
#194 Chatham
County, IL
100 A
#195 Cheney
County, WA
100 A
#196 Chesaning
County, MI
100 A
#197 Chesapeake
County, VA
100 A
#198 Chesterfield
County, VA
100 A
#199 Chippewa Falls
County, WI
100 A
#200 Chrisfield
County, MD
100 A
#201 Clairfield
County, TN
100 A
#202 Clare
County, MI
100 A
#203 Claremont
County, CA
100 A
#204 Clarendon
County, NY
100 A
#205 Clarendon
County, VT
100 A
#206 Clarksburg
County, TN
100 A
#207 Clarksdale
County, MO
100 A
#208 Clarkston
County, MI
100 A
#209 Clarkston
County, WA
100 A
#210 Clay
County, NY
100 A
#211 Clayton
County, NY
100 A
#212 Clear Brook
County, VA
100 A
#213 Clearwater
County, MN
100 A
#214 Clifton
County, CO
100 A
#215 Clinton
County, WA
100 A
#216 Clinton Township
County, MI
100 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.