City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6193
Cuthbert
County, GA
85 B
#6194 Dandridge
County, TN
85 B
#6195 Dayton
County, IN
85 B
#6196 Dearborn
County, MO
85 B
#6197 Deer Lodge
County, MT
85 B
#6198 Delhi
County, CA
85 B
#6199 Denver City
County, TX
85 B
#6200 Dousman
County, WI
85 B
#6201 Dowell
County, IL
85 B
#6202 Duncansville
County, PA
85 B
#6203 Eagle
County, CO
85 B
#6204 Eldridge
County, IA
85 B
#6205 Ellaville
County, GA
85 B
#6206 Ellisville
County, MS
85 B
#6207 Fairburn
County, GA
85 B
#6208 Fall River
County, WI
85 B
#6209 Flagler
County, CO
85 B
#6210 Florence
County, AL
85 B
#6211 Fort Carson
County, CO
85 B
#6212 Fort Stewart
County, GA
85 B
#6213 Frankton
County, IN
85 B
#6214 Fredericksburg
County, PA
85 B
#6215 Fredericktown
County, MO
85 B
#6216 Frenchville
County, PA
85 B
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.