City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#433
Inman
County, SC
100 A
#434 Intervale
County, NH
100 A
#435 Iowa Colony
County, TX
100 A
#436 Iowa Falls
County, IA
100 A
#437 Ira
County, MI
100 A
#438 Irmo
County, SC
100 A
#439 Ironwood
County, MI
100 A
#440 Isanti
County, MN
100 A
#441 Isleta
County, NM
100 A
#442 Ivanhoe
County, TX
100 A
#443 Jacksonville
County, IL
100 A
#444 Jacksonville
County, AR
100 A
#445 Jamestown
County, NY
100 A
#446 Jamestown
County, IN
100 A
#447 Jefferson Hills
County, PA
100 A
#448 Jeffersonville
County, KY
100 A
#449 Jeffersonville
County, IN
100 A
#450 Jekyll Island
County, GA
100 A
#451 Jonesboro
County, AR
100 A
#452 Kailua-Kona
County, HI
100 A
#453 Kalkaska
County, MI
100 A
#454 Kansas 44841
County, OH
100 A
#455 Keenesburg
County, CO
100 A
#456 Kelseyville
County, CA
100 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.