City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#577
Middletown
County, MD
100 A
#578 Milano
County, TX
100 A
#579 Millbrae
County, CA
100 A
#580 Millersburg
County, OH
100 A
#581 Millersport
County, OH
100 A
#582 Millerton
County, NY
100 A
#583 Milton
County, NY
100 A
#584 Minden
County, NE
100 A
#585 Minneapolis
County, MN
100 A
#586 Mishawaka
County, IN
100 A
#587 Mitchells
County, VA
100 A
#588 Moca
County, PR
100 A
#589 Moffett Field
County, CA
100 A
#590 Mojave
County, CA
100 A
#591 Monetta
County, SC
100 A
#592 Monroeville
County, OH
100 A
#593 Monroeville
County, AL
100 A
#594 Montevideo
County, MN
100 A
#595 Moorpark
County, CA
100 A
#596 Moose
County, WY
100 A
#597 Moravia
County, NY
100 A
#598 Moreau
County, NY
100 A
#599 Moses Lake
County, WA
100 A
#600 Mounds View
County, MN
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.