City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2881
Caddo Mills
County, TX
95 A
#2882 California
County, MD
95 A
#2883 Canton
County, NY
95 A
#2884 Carrollton
County, AL
95 A
#2885 Cassville
County, MO
95 A
#2886 Castle Rock
County, CO
95 A
#2887 Castleton
County, NY
95 A
#2888 Center Line
County, MI
95 A
#2889 Centre
County, AL
95 A
#2890 Charlevoix
County, MI
95 A
#2891 Chatham
County, NY
95 A
#2892 Chelsea
County, MA
95 A
#2893 Chesterfield
County, SC
95 A
#2894 Chickamauga
County, GA
95 A
#2895 Clark
County, SD
95 A
#2896 Clarks Summit
County, PA
95 A
#2897 Cle Elum
County, WA
95 A
#2898 Clinton
County, NC
95 A
#2899 Cokato
County, MN
95 A
#2900 Coldspring
County, TX
95 A
#2901 Copper Mountain
County, CO
95 A
#2902 Cullman
County, AL
95 A
#2903 Cullowhee
County, NC
95 A
#2904 De Soto
County, MO
95 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.