City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7729
Sunderland
County, MA
78 B
#7730 Swampscott
County, MA
78 B
#7731 Swansea
County, MA
78 B
#7732 Sykesville
County, MD
78 B
#7733 Taos Ski Valley
County, NM
78 B
#7734 Tijeras
County, NM
78 B
#7735 Topton
County, PA
78 B
#7736 Tornado
County, WV
78 B
#7737 Truman
County, MN
78 B
#7738 Twin City
County, GA
78 B
#7739 Valley View
County, TX
78 B
#7740 Ventor City
County, NJ
78 B
#7741 Vermilion
County, OH
78 B
#7742 Vicksburg
County, MI
78 B
#7743 Wakarusa
County, IN
78 B
#7744 Walnut
County, MS
78 B
#7745 Walpole
County, MA
78 B
#7746 Waltham
County, MA
78 B
#7747 Wappappello
County, MO
78 B
#7748 Wasco
County, IL
78 B
#7749 Washington
County, DC
78 B
#7750 Watertown
County, CT
78 B
#7751 Waukon
County, IA
78 B
#7752 Waynesville
County, MO
78 B
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.