City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#553
Keenesburg
County, CO
100 A
#554 Kelseyville
County, CA
100 A
#555 Keshena
County, WI
100 A
#556 Kettering
County, OH
100 A
#557 Kewaskum
County, WI
100 A
#558 Keyes
County, CA
100 A
#559 Keystone
County, SD
100 A
#560 Kimball
County, NE
100 A
#561 King William
County, VA
100 A
#562 Kings Bay
County, GA
100 A
#563 Kings Park
County, NY
100 A
#564 Kingston
County, RI
100 A
#565 Kirkland
County, WA
100 A
#566 Kirkwood
County, CA
100 A
#567 Kirkwood
County, MO
100 A
#568 Kirkwood
County, NY
100 A
#569 Kittitas
County, WA
100 A
#570 Kohler
County, WI
100 A
#571 La Canada Flintridge
County, CA
100 A
#572 La Coste
County, TX
100 A
#573 La Habra Heights
County, CA
100 A
#574 La Mesa
County, CA
100 A
#575 La Plata
County, NM
100 A
#576 La Porte
County, CO
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.