City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6481
Lebanon
County, IN
84 B
#6482 Leeds
County, AL
84 B
#6483 Lehighton
County, PA
84 B
#6484 Leitchfield
County, KY
84 B
#6485 Letts
County, IA
84 B
#6486 Lewiston
County, MN
84 B
#6487 Lisbon
County, NH
84 B
#6488 Little Rock
County, MS
84 B
#6489 Livingston
County, CA
84 B
#6490 Lockland
County, OH
84 B
#6491 Longview
County, NC
84 B
#6492 Los Alamitos
County, CA
84 B
#6493 Lula
County, GA
84 B
#6494 Luverne
County, AL
84 B
#6495 Lynn
County, IN
84 B
#6496 Machesney Park
County, IL
84 B
#6497 Maggie Valley
County, NC
84 B
#6498 Marion
County, SC
84 B
#6499 Markham
County, TX
84 B
#6500 Marshfield
County, MO
84 B
#6501 Matawan
County, NJ
84 B
#6502 Mayflower
County, AR
84 B
#6503 Maysville
County, KY
84 B
#6504 Mayville
County, ND
84 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.