City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#601
Mount Airy
County, NC
100 A
#602 Mount Berry
County, GA
100 A
#603 Mount Blanchard
County, OH
100 A
#604 Mount Gillead
County, OH
100 A
#605 Mount Juliet
County, TN
100 A
#606 Mount Morris
County, NY
100 A
#607 Mountain House
County, CA
100 A
#608 Mountain View
County, CA
100 A
#609 Mountain View
County, AR
100 A
#610 Mountainburg
County, AR
100 A
#611 Moxee
County, WA
100 A
#612 Mt. Baldy
County, CA
100 A
#613 Mukilteo
County, WA
100 A
#614 Murdo
County, SD
100 A
#615 Murphy
County, TX
100 A
#616 Murray
County, NE
100 A
#617 Muskego
County, WI
100 A
#618 Muskgon
County, MI
100 A
#619 Nags Head
County, NC
100 A
#620 Nas Whidbey Island
County, WA
100 A
#621 Nassau
County, NY
100 A
#622 Nebraksa City
County, NE
100 A
#623 New Boston
County, MI
100 A
#624 New Brighton
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.