City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2545
Marinette
County, WI
96 A
#2546 Marion
County, IN
96 A
#2547 Marlette
County, MI
96 A
#2548 Marshall
County, MN
96 A
#2549 Marshfield
County, WI
96 A
#2550 Martin
County, TN
96 A
#2551 Martinsville
County, VA
96 A
#2552 Mashpee
County, MA
96 A
#2553 Massapequa
County, NY
96 A
#2554 Maud
County, TX
96 A
#2555 Maumee
County, OH
96 A
#2556 Mcdonough
County, GA
96 A
#2557 Mcfarland
County, WI
96 A
#2558 Mckinney
County, KY
96 A
#2559 Mead
County, WA
96 A
#2560 Mechanic Falls
County, ME
96 A
#2561 Medford
County, OR
96 A
#2562 Medford
County, WI
96 A
#2563 Mercer Island
County, WA
96 A
#2564 Meridian
County, ID
96 A
#2565 Merrill
County, WI
96 A
#2566 Merton
County, WI
96 A
#2567 Mesa Verde
County, CO
96 A
#2568 Mi Wuk Village
County, CA
96 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.