City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10249
Afton
County, OK
47 D
#10250 Ashland
County, KY
47 D
#10251 Billerica
County, MA
47 D
#10252 Braddock
County, PA
47 D
#10253 Bushland
County, TX
47 D
#10254 Cleveland
County, OK
47 D
#10255 Combes
County, TX
47 D
#10256 Decatur
County, TX
47 D
#10257 Elbrige
County, NY
47 D
#10258 Fair Lawn Boro
County, NJ
47 D
#10259 Glenbrook
County, NV
47 D
#10260 Graysville
County, TN
47 D
#10261 Grayville
County, IL
47 D
#10262 Hemphill
County, TX
47 D
#10263 Herkimer
County, NY
47 D
#10264 Hope
County, AR
47 D
#10265 Jamestown
County, RI
47 D
#10266 Jamul
County, CA
47 D
#10267 Juneau
County, WI
47 D
#10268 Lake Elmo
County, MN
47 D
#10269 Leonville
County, LA
47 D
#10270 Marion
County, IL
47 D
#10271 Mayville
County, NY
47 D
#10272 Morton
County, TX
47 D
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.