WaterQ

City Water Quality Rankings

11,696 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#3937
Campton
County, NH
92 A
#3938
Caneadea
County, NY
92 A
#3939
Canton
County, MO
92 A
#3940
Carrollton
County, OH
92 A
#3941
Caruthers
County, CA
92 A
#3942
Castroville
County, CA
92 A
#3943
Cedar Hill
County, MO
92 A
#3944
Cedar Park
County, TX
92 A
#3945
Celina
County, TN
92 A
#3946
Celina
County, TX
92 A
#3947
Chapel Hill
County, TN
92 A
#3948
Chapman
County, KS
92 A
#3949
Charleston
County, MS
92 A
#3950
Chatam
County, NJ
92 A
#3951
Chatsworth
County, GA
92 A
#3952
Chauncey
County, OH
92 A
#3953
Childersburg
County, AL
92 A
#3954
Citrus Heights
County, CA
92 A
#3955
Clayton
County, GA
92 A
#3956
Clifton
County, IL
92 A
#3957
Clovis
County, CA
92 A
#3958
Coats
County, NC
92 A
#3959
Colby
County, WI
92 A
#3960
Coldwater
County, MI
92 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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