City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1129
West Linn
County, OR
100 A
#1130 West Memphis
County, AR
100 A
#1131 West Salem
County, OH
100 A
#1132 West Yellowstone
County, MT
100 A
#1133 Westlake
County, TX
100 A
#1134 Westport
County, MA
100 A
#1135 Westwood
County, CA
100 A
#1136 Wexford
County, PA
100 A
#1137 Wheatfield
County, IN
100 A
#1138 Wheatland
County, CA
100 A
#1139 Whitmore Lake
County, MI
100 A
#1140 Whittaker
County, MI
100 A
#1141 Whittier
County, CA
100 A
#1142 Wichita
County, KS
100 A
#1143 Wickes
County, AR
100 A
#1144 Wilder
County, ID
100 A
#1145 Wilkesboro
County, NC
100 A
#1146 Williams
County, CA
100 A
#1147 Williston
County, SC
100 A
#1148 Williston Park
County, NY
100 A
#1149 Wilmot
County, WI
100 A
#1150 Wilson
County, MI
100 A
#1151 Winchester
County, NH
100 A
#1152 Windsor
County, CA
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.