City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#481
Laconner
County, WA
100 A
#482 Lagrange
County, GA
100 A
#483 Laguna Hills
County, CA
100 A
#484 Lake Elsinore
County, CA
100 A
#485 Lake Forest
County, CA
100 A
#486 Lake Geneva
County, WI
100 A
#487 Lakeland
County, MN
100 A
#488 Lakeside
County, OR
100 A
#489 Lakeside
County, MT
100 A
#490 Lakeville
County, NY
100 A
#491 Lakeville
County, MN
100 A
#492 Lamont
County, CA
100 A
#493 Lancaster
County, IL
100 A
#494 Lancaster
County, KS
100 A
#495 Lansing
County, NY
100 A
#496 Larchmont
County, NY
100 A
#497 Lathrop
County, CA
100 A
#498 Laurel
County, MD
100 A
#499 Leachville
County, AR
100 A
#500 Lead
County, SD
100 A
#501 League City
County, TX
100 A
#502 Leesburg
County, VA
100 A
#503 Lenexa
County, KS
100 A
#504 Lenox
County, MI
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.