City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#577
Laconner
County, WA
100 A
#578 Lagrange
County, GA
100 A
#579 Laguna Hills
County, CA
100 A
#580 Lake Arrowhead
County, CA
100 A
#581 Lake Benton
County, MN
100 A
#582 Lake City
County, SC
100 A
#583 Lake Elsinore
County, CA
100 A
#584 Lake Forest
County, CA
100 A
#585 Lake Jackson
County, TX
100 A
#586 Lakeland
County, MN
100 A
#587 Lakeport
County, NH
100 A
#588 Lakeside
County, MT
100 A
#589 Lakeside
County, OR
100 A
#590 Lakeview
County, OH
100 A
#591 Lakeville
County, MN
100 A
#592 Lakeville
County, NY
100 A
#593 Lambertville
County, NJ
100 A
#594 Lamont
County, CA
100 A
#595 Lancaster
County, IL
100 A
#596 Lancaster
County, KS
100 A
#597 Lansing
County, MI
100 A
#598 Lansing
County, NY
100 A
#599 Lantana
County, TX
100 A
#600 Larchmont
County, NY
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.