City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5401
Hawaii National Park
County, HI
88 B
#5402 Hayfield
County, MN
88 B
#5403 Hayward
County, CA
88 B
#5404 Helen
County, GA
88 B
#5405 Hendersonville
County, TN
88 B
#5406 Highland Park
County, IL
88 B
#5407 Hoisington
County, KS
88 B
#5408 Holiday Island
County, AR
88 B
#5409 Holt
County, MO
88 B
#5410 Homer City
County, PA
88 B
#5411 Homerville
County, GA
88 B
#5412 Honolulu
County, HI
88 B
#5413 Hoopeston
County, IL
88 B
#5414 Horicon
County, WI
88 B
#5415 Houghton Lake
County, MI
88 B
#5416 Hoxie
County, KS
88 B
#5417 Huntingdon
County, PA
88 B
#5418 Hyrum
County, UT
88 B
#5419 Independence
County, MO
88 B
#5420 Indio
County, CA
88 B
#5421 Inglewood
County, CA
88 B
#5422 Inkster
County, MI
88 B
#5423 Iola
County, WI
88 B
#5424 Irving
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.