City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#721
Moreno Valley
County, CA
100 A
#722 Morganton
County, NC
100 A
#723 Morgantown
County, WV
100 A
#724 Moses Lake
County, WA
100 A
#725 Mounds View
County, MN
100 A
#726 Mount Airy
County, MD
100 A
#727 Mount Berry
County, GA
100 A
#728 Mount Blanchard
County, OH
100 A
#729 Mount Gillead
County, OH
100 A
#730 Mount Juliet
County, TN
100 A
#731 Mount Morris
County, NY
100 A
#732 Mountain House
County, CA
100 A
#733 Mountain Lake Park
County, MD
100 A
#734 Mountain View
County, AR
100 A
#735 Mountain View
County, CA
100 A
#736 Mountainburg
County, AR
100 A
#737 Moxee
County, WA
100 A
#738 Mt Hood
County, OR
100 A
#739 Mt Vernon
County, WA
100 A
#740 Mt. Baldy
County, CA
100 A
#741 Mukilteo
County, WA
100 A
#742 Murdo
County, SD
100 A
#743 Murphy
County, TX
100 A
#744 Murray
County, NE
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.