City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#457
Keshena
County, WI
100 A
#458 Kettering
County, OH
100 A
#459 Kewaskum
County, WI
100 A
#460 Keyes
County, CA
100 A
#461 Keystone
County, SD
100 A
#462 Kimball
County, NE
100 A
#463 King William
County, VA
100 A
#464 Kings Bay
County, GA
100 A
#465 Kings Park
County, NY
100 A
#466 Kingston
County, RI
100 A
#467 Kirkland
County, WA
100 A
#468 Kirkwood
County, CA
100 A
#469 Kirkwood
County, MO
100 A
#470 Kirkwood
County, NY
100 A
#471 Kittitas
County, WA
100 A
#472 Kohler
County, WI
100 A
#473 La Canada Flintridge
County, CA
100 A
#474 La Coste
County, TX
100 A
#475 La Crosse
County, WI
100 A
#476 La Habra Heights
County, CA
100 A
#477 La Mesa
County, CA
100 A
#478 La Plata
County, NM
100 A
#479 La Porte
County, CO
100 A
#480 Laconia
County, NH
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.