City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5425
Jackson Center
County, OH
88 B
#5426 Jefferson
County, IA
88 B
#5427 Johnsonville
County, SC
88 B
#5428 Joseph
County, OR
88 B
#5429 Junction City
County, AR
88 B
#5430 Kalamazoo
County, MI
88 B
#5431 Katonah
County, NY
88 B
#5432 Kincheloe
County, MI
88 B
#5433 Kokomo
County, MS
88 B
#5434 Kure Beach
County, NC
88 B
#5435 Lafayette
County, IN
88 B
#5436 Lagrange
County, KY
88 B
#5437 Lake City
County, IA
88 B
#5438 Lake City
County, PA
88 B
#5439 Lake Lure
County, NC
88 B
#5440 Lake Mills
County, IA
88 B
#5441 Lapine
County, AL
88 B
#5442 Larkspur
County, CO
88 B
#5443 Laton
County, CA
88 B
#5444 Laughlin
County, NV
88 B
#5445 Laughlin Afb
County, TX
88 B
#5446 Lavallette
County, NJ
88 B
#5447 Leakey
County, TX
88 B
#5448 Lenox
County, GA
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.