City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#529
Intervale
County, NH
100 A
#530 Iowa Falls
County, IA
100 A
#531 Ira
County, MI
100 A
#532 Irmo
County, SC
100 A
#533 Ironwood
County, MI
100 A
#534 Isanti
County, MN
100 A
#535 Isleta
County, NM
100 A
#536 Ivanhoe
County, TX
100 A
#537 Jacinto City
County, TX
100 A
#538 Jackson
County, SC
100 A
#539 Jacksonville
County, AR
100 A
#540 Jacksonville
County, IL
100 A
#541 Jamestown
County, IN
100 A
#542 Jamestown
County, NY
100 A
#543 Jefferson Hills
County, PA
100 A
#544 Jeffersonville
County, IN
100 A
#545 Jeffersonville
County, KY
100 A
#546 Jekyll Island
County, GA
100 A
#547 Jonesboro
County, AR
100 A
#548 Jonesville
County, MI
100 A
#549 Kahoka
County, MO
100 A
#550 Kailua-Kona
County, HI
100 A
#551 Kalkaska
County, MI
100 A
#552 Kansas 44841
County, OH
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.