City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#649
Lucerne
County, CO
100 A
#650 Luck
County, WI
100 A
#651 Ludington
County, MI
100 A
#652 Luttrell
County, TN
100 A
#653 Lyman
County, NE
100 A
#654 Lyman
County, SC
100 A
#655 Lyndonville
County, NY
100 A
#656 Lyons
County, CO
100 A
#657 Lyons
County, NY
100 A
#658 Mabelvale
County, AR
100 A
#659 Mabton
County, WA
100 A
#660 Machias
County, ME
100 A
#661 Madawaska
County, ME
100 A
#662 Madison
County, SD
100 A
#663 Madison Heights
County, MI
100 A
#664 Maidsville
County, WV
100 A
#665 Maize
County, KS
100 A
#666 Malta
County, OH
100 A
#667 Manchester
County, NH
100 A
#668 Mandan
County, ND
100 A
#669 Manhattan
County, KS
100 A
#670 Mankato
County, MN
100 A
#671 Mantorville
County, MN
100 A
#672 Maple Valley
County, WA
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.