City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3145
Callisburg
County, TX
94 A
#3146 Camas
County, WA
94 A
#3147 Cambridge
County, MA
94 A
#3148 Cambridge
County, MD
94 A
#3149 Cambridge
County, NE
94 A
#3150 Camden
County, TN
94 A
#3151 Campbellsport
County, WI
94 A
#3152 Carlisle
County, KY
94 A
#3153 Caro
County, MI
94 A
#3154 Carroll
County, IA
94 A
#3155 Casper
County, WY
94 A
#3156 Cass City
County, MI
94 A
#3157 Cassatt
County, SC
94 A
#3158 Cave City
County, AR
94 A
#3159 Cayuga
County, IN
94 A
#3160 Cedar Grove
County, WI
94 A
#3161 Centerport
County, NY
94 A
#3162 Champlin
County, MN
94 A
#3163 Chanute
County, KS
94 A
#3164 Charleston
County, MO
94 A
#3165 Chase City
County, VA
94 A
#3166 Chaska
County, MN
94 A
#3167 Chebanse
County, IL
94 A
#3168 Cheney
County, KS
94 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.