City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#5041
Wanamingo
County, MN
90 A
#5042 Warren
County, OH
90 A
#5043 Washington Terrace
County, UT
90 A
#5044 Wayland
County, MI
90 A
#5045 Webster City
County, IA
90 A
#5046 Weed
County, CA
90 A
#5047 Wellington
County, KS
90 A
#5048 Wendell
County, ID
90 A
#5049 West Reading
County, PA
90 A
#5050 Weston
County, MA
90 A
#5051 Wharton
County, NJ
90 A
#5052 Wilkeson
County, WA
90 A
#5053 Williamston
County, NC
90 A
#5054 Windham
County, OH
90 A
#5055 Wintersville
County, OH
90 A
#5056 Woods Cross
County, UT
90 A
#5057 Worthington
County, KY
90 A
#5058 Wrentham
County, MA
90 A
#5059 Young Harris
County, GA
90 A
#5060 Albany
County, IN
89 B
#5061 Alexandria
County, LA
89 B
#5062 Athena
County, OR
89 B
#5063 Athens
County, NY
89 B
#5064 Aurora
County, IN
89 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.