City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1105
Warren
County, MI
100 A
#1106 Washington
County, KS
100 A
#1107 Washington
County, MI
100 A
#1108 Washington Courthouse
County, OH
100 A
#1109 Washtucna
County, WA
100 A
#1110 Waterford
County, CA
100 A
#1111 Waterloo
County, NE
100 A
#1112 Waterport
County, NY
100 A
#1113 Waterville
County, OH
100 A
#1114 Wautoma
County, WI
100 A
#1115 Waverly
County, MN
100 A
#1116 Waverly
County, NE
100 A
#1117 Waverly
County, VA
100 A
#1118 Waverly
County, WA
100 A
#1119 Waynesboro
County, VA
100 A
#1120 Webster
County, TX
100 A
#1121 Wells
County, MN
100 A
#1122 Wellsville
County, KS
100 A
#1123 Wenatchee
County, WA
100 A
#1124 West Bloomfield
County, MI
100 A
#1125 West Fargo
County, ND
100 A
#1126 West Glacier
County, MT
100 A
#1127 West Lafayette
County, IN
100 A
#1128 West Lake Hills
County, TX
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.