City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#505
Lepanto
County, AR
100 A
#506 Lewiston
County, NC
100 A
#507 Lewisville
County, AR
100 A
#508 Lexington
County, VA
100 A
#509 Liberty Lake
County, WA
100 A
#510 Lincoln
County, NE
100 A
#511 Lincoln
County, RI
100 A
#512 Lincoln
County, CA
100 A
#513 Linden
County, CA
100 A
#514 Little Valley
County, NY
100 A
#515 Live Oak
County, TX
100 A
#516 Live Oak
County, CA
100 A
#517 Livermore
County, CA
100 A
#518 Livonia
County, MI
100 A
#519 Livonia
County, LA
100 A
#520 Lockeford
County, CA
100 A
#521 Lockport
County, LA
100 A
#522 Locust Grove
County, GA
100 A
#523 Locust Valley
County, NY
100 A
#524 Lod
County, CA
100 A
#525 Lodi
County, OH
100 A
#526 Loganville
County, GA
100 A
#527 Lomita
County, CA
100 A
#528 Long Bottom
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.