WaterQ

City Water Quality Rankings

11,696 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#169
Carbon Hill
County, AL
100 A
#170
Carle Place
County, NY
100 A
#171
Carleton
County, MI
100 A
#172
Carlisle
County, AR
100 A
#173
Carlsbad
County, CA
100 A
#174
Carlton
County, MN
100 A
#175
Carpinteria
County, CA
100 A
#176
Carrboro
County, NC
100 A
#177
Carrollton
County, GA
100 A
#178
Carrollton
County, TX
100 A
#179
Carthage
County, AR
100 A
#180
Carthage
County, MO
100 A
#181
Caseville
County, MI
100 A
#182
Casselton
County, ND
100 A
#183
Castaic
County, CA
100 A
#184
Cayucos
County, CA
100 A
#185
Cazenovia
County, NY
100 A
#186
Cedar Hill
County, TX
100 A
#187
Cedarpines Park
County, CA
100 A
#188
Cedarville
County, AR
100 A
#189
Central City
County, NE
100 A
#190
Cerritos
County, CA
100 A
#191
Chamberlain
County, SD
100 A
#192
Chapin
County, SC
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.

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