City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3961
Colts Neck
County, NJ
92 A
#3962 Conway
County, SC
92 A
#3963 Cookeville
County, TN
92 A
#3964 Coos Bay
County, OR
92 A
#3965 Coraopolis
County, PA
92 A
#3966 Corinth
County, NY
92 A
#3967 Corolla
County, NC
92 A
#3968 Corryton
County, TN
92 A
#3969 Cortlandt Manor
County, NY
92 A
#3970 Cottrellville
County, MI
92 A
#3971 Covington
County, IN
92 A
#3972 Coxsackie
County, NY
92 A
#3973 Craig
County, CO
92 A
#3974 Crestone
County, CO
92 A
#3975 Crete
County, IL
92 A
#3976 Croton-On-Hudson
County, NY
92 A
#3977 Cudahy
County, CA
92 A
#3978 Darien
County, WI
92 A
#3979 Dawson
County, GA
92 A
#3980 Dawson Springs
County, KY
92 A
#3981 Dayton
County, VA
92 A
#3982 Deep Run
County, NC
92 A
#3983 Denver
County, CO
92 A
#3984 Deridder
County, LA
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.