WaterQ

City Water Quality Rankings

11,561 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#11065
Coupland
County, TX
0 F
#11066
Craig
County, AK
0 F
#11067
Creech Afb
County, NV
0 F
#11068
Creighton
County, PA
0 F
#11069
Cresco
County, IA
0 F
#11070
Crest Hill
County, IL
0 F
#11071
Crewe
County, VA
0 F
#11072
Crowder
County, OK
0 F
#11073
Cuba
County, NM
0 F
#11074
Danville
County, KY
0 F
#11075
Danville
County, AR
0 F
#11076
Davidsville
County, PA
0 F
#11077
Davis
County, OK
0 F
#11078
Dawson
County, IL
0 F
#11079
De Leon
County, TX
0 F
#11080
Deatsville
County, AL
0 F
#11081
Decatur
County, AR
0 F
#11082
Delight
County, AR
0 F
#11083
Denali Park
County, AK
0 F
#11084
Diboll
County, TX
0 F
#11085
Dickeyville
County, WI
0 F
#11086
Dickinson
County, AL
0 F
#11087
Dilliner
County, PA
0 F
#11088
Dillingham
County, AK
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.

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