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.