City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5473
Martin
County, SD
88 B
#5474 Marysville
County, MI
88 B
#5475 Mauriceville
County, TX
88 B
#5476 Mayer
County, AZ
88 B
#5477 Mc Crory
County, AR
88 B
#5478 Mckenzie
County, TN
88 B
#5479 Mcmurry
County, PA
88 B
#5480 Mconnelsville
County, OH
88 B
#5481 Melrose
County, NY
88 B
#5482 Menomonee Falls
County, WI
88 B
#5483 Middletown
County, CA
88 B
#5484 Middletown
County, OH
88 B
#5485 Millport
County, AL
88 B
#5486 Milton
County, FL
88 B
#5487 Milwaukie
County, OR
88 B
#5488 Minden
County, LA
88 B
#5489 Minneota
County, MN
88 B
#5490 Mitchell
County, NE
88 B
#5491 Mohawk
County, TN
88 B
#5492 Molino
County, FL
88 B
#5493 Mondovi
County, WI
88 B
#5494 Monroe
County, IA
88 B
#5495 Monroe
County, WI
88 B
#5496 Montague
County, CA
88 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.