City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10201
Bountiful
County, UT
48 D
#10202 Buena Vista
County, GA
48 D
#10203 Carmi
County, IL
48 D
#10204 Chandler
County, AZ
48 D
#10205 Colon
County, MI
48 D
#10206 Coweta
County, OK
48 D
#10207 Dudley
County, MA
48 D
#10208 Easthampton
County, MA
48 D
#10209 Encinal
County, TX
48 D
#10210 Everglades City
County, FL
48 D
#10211 Fort Sill
County, OK
48 D
#10212 Franklinville
County, NJ
48 D
#10213 Frenchburg
County, KY
48 D
#10214 Gardner
County, MA
48 D
#10215 Gettysburg
County, PA
48 D
#10216 Goldsby
County, OK
48 D
#10217 Harrisonburg
County, LA
48 D
#10218 Hartington
County, NE
48 D
#10219 Homer
County, MI
48 D
#10220 Hookstown
County, PA
48 D
#10221 Horseheads
County, NY
48 D
#10222 Jayuya
County, PR
48 D
#10223 Johnsburg
County, IL
48 D
#10224 Mart
County, TX
48 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.