City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4561
Monument
County, CO
91 A
#4562 Morocco
County, IN
91 A
#4563 Morrison
County, IL
91 A
#4564 Mosinee
County, WI
91 A
#4565 Mount Airy
County, NC
91 A
#4566 Mountain Iron
County, MN
91 A
#4567 Mt View
County, MO
91 A
#4568 Mt. Angel
County, OR
91 A
#4569 Munster
County, IN
91 A
#4570 Murfreesboro
County, TN
91 A
#4571 Muskegon Heights
County, MI
91 A
#4572 Nashville
County, GA
91 A
#4573 New Holstein
County, WI
91 A
#4574 New London
County, MN
91 A
#4575 New Vienna
County, OH
91 A
#4576 North Chelmsford
County, MA
91 A
#4577 North Judson
County, IN
91 A
#4578 Oak Ridge
County, TN
91 A
#4579 Old Westbury
County, NY
91 A
#4580 Olean
County, NY
91 A
#4581 Olympia
County, WA
91 A
#4582 Onancock
County, VA
91 A
#4583 Oneida
County, NY
91 A
#4584 Orland
County, CA
91 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.