City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6121
Union
County, MO
86 B
#6122 Union
County, SC
86 B
#6123 Union City
County, MI
86 B
#6124 Vale
County, OR
86 B
#6125 Vance
County, AL
86 B
#6126 Vendor
County, AR
86 B
#6127 Victoria
County, VA
86 B
#6128 Waconia
County, MN
86 B
#6129 Waldport
County, OR
86 B
#6130 Warsaw
County, OH
86 B
#6131 Waseca
County, MN
86 B
#6132 Watertown
County, WI
86 B
#6133 Waterville
County, ME
86 B
#6134 Watervliet
County, MI
86 B
#6135 Weldon
County, NC
86 B
#6136 West Cape May
County, NJ
86 B
#6137 West Liberty
County, KY
86 B
#6138 West Point
County, NE
86 B
#6139 Wetumpka
County, AL
86 B
#6140 Weymouth
County, MA
86 B
#6141 Wheaton
County, MN
86 B
#6142 Wheeling
County, MO
86 B
#6143 White Lake
County, NC
86 B
#6144 Williamsburg
County, OH
86 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.