City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3217
Delhi
County, NY
94 A
#3218 Dell Rapids
County, SD
94 A
#3219 Denison
County, IA
94 A
#3220 Deposit
County, NY
94 A
#3221 Devils Lake
County, ND
94 A
#3222 Dexter
County, MI
94 A
#3223 Dierks
County, AR
94 A
#3224 Donalsonville
County, GA
94 A
#3225 Dubois
County, PA
94 A
#3226 Dunkirk
County, IN
94 A
#3227 Durham
County, CA
94 A
#3228 Durhamville
County, NY
94 A
#3229 East Brewton
County, AL
94 A
#3230 East Meadow
County, NY
94 A
#3231 East Troy
County, WI
94 A
#3232 Easvtille
County, VA
94 A
#3233 El Verano
County, CA
94 A
#3234 Elgin
County, TX
94 A
#3235 Elk Run Heights
County, IA
94 A
#3236 Ellenville
County, NY
94 A
#3237 Elmore
County, AL
94 A
#3238 Escalon
County, CA
94 A
#3239 Essex
County, MA
94 A
#3240 Essex Junction
County, VT
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.