City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3409
Mena
County, AR
94 A
#3410 Mendon
County, MA
94 A
#3411 Mendota
County, CA
94 A
#3412 Mentone
County, IN
94 A
#3413 Mentor
County, OH
94 A
#3414 Mexico
County, MO
94 A
#3415 Mexico
County, NY
94 A
#3416 Middlebury
County, VT
94 A
#3417 Middlesboro
County, KY
94 A
#3418 Midland
County, MI
94 A
#3419 Milton
County, DE
94 A
#3420 Milton
County, MA
94 A
#3421 Milton
County, NY
94 A
#3422 Mineola
County, TX
94 A
#3423 Minonk
County, IL
94 A
#3424 Missoula
County, MT
94 A
#3425 Monroeville
County, IN
94 A
#3426 Monterey
County, LA
94 A
#3427 Moody Afb
County, GA
94 A
#3428 Morganton
County, GA
94 A
#3429 Morgantown
County, IN
94 A
#3430 Morgantown
County, PA
94 A
#3431 Morro Bay
County, CA
94 A
#3432 Morrow
County, GA
94 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.