City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11185
Haworth
County, OK
0 F
#11186 Hazard
County, KY
0 F
#11187 Hazlehurst
County, GA
0 F
#11188 Heavener
County, OK
0 F
#11189 Hebbronville
County, TX
0 F
#11190 Helena
County, AR
0 F
#11191 Hendricks
County, WV
0 F
#11192 Hennessey
County, OK
0 F
#11193 High Bridge
County, NJ
0 F
#11194 Hildale
County, UT
0 F
#11195 Holdenville
County, OK
0 F
#11196 Hollis
County, OK
0 F
#11197 Homer
County, AK
0 F
#11198 Hominy
County, OK
0 F
#11199 Hoopa
County, CA
0 F
#11200 Hooper Bay
County, AK
0 F
#11201 Horsham
County, PA
0 F
#11202 Hotchkiss
County, CO
0 F
#11203 Hudson
County, MA
0 F
#11204 Hughesville
County, PA
0 F
#11205 Hughson
County, CA
0 F
#11206 Hugo
County, OK
0 F
#11207 Hyden
County, KY
0 F
#11208 Idabel
County, OK
0 F
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.