City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5329
Delran
County, NJ
88 B
#5330 Demorest
County, GA
88 B
#5331 Denville
County, NJ
88 B
#5332 Dodgeville
County, WI
88 B
#5333 Donaldson
County, AR
88 B
#5334 Dothan
County, AL
88 B
#5335 Douglas
County, GA
88 B
#5336 Dover
County, AR
88 B
#5337 Dover
County, OH
88 B
#5338 Driggs
County, ID
88 B
#5339 Durango
County, CO
88 B
#5340 Earlimart
County, CA
88 B
#5341 Earlville
County, IL
88 B
#5342 East Bernard
County, TX
88 B
#5343 East Petersburg
County, PA
88 B
#5344 East Providence
County, RI
88 B
#5345 Eglin Afb
County, FL
88 B
#5346 Elgin
County, IL
88 B
#5347 Elizabethtown
County, KY
88 B
#5348 Elk Rapids
County, MI
88 B
#5349 Elk River
County, MN
88 B
#5350 Ellendale
County, ND
88 B
#5351 Elmendorf
County, TX
88 B
#5352 Elmo
County, TX
88 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.