City Water Quality Rankings in Wisconsin
269 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#121
Oostburg
County, WI
92 A
#122 Plymouth
County, WI
92 A
#123 Redgranite
County, WI
92 A
#124 Rhinelander
County, WI
92 A
#125 Richland Center
County, WI
92 A
#126 Sauk City
County, WI
92 A
#127 Spring Green
County, WI
92 A
#128 Strum
County, WI
92 A
#129 Turtle Lake
County, WI
92 A
#130 Union Grove
County, WI
92 A
#131 Waupun
County, WI
92 A
#132 Webster
County, WI
92 A
#133 Sheboygan
County, WI
91 A
#134 Whitehall
County, WI
91 A
#135 Adams
County, WI
90 A
#136 Belgium
County, WI
90 A
#137 Clear Lake
County, WI
90 A
#138 Greendale
County, WI
90 A
#139 Hartland
County, WI
90 A
#140 Lake Delton
County, WI
90 A
#141 Lomira
County, WI
90 A
#142 Manitowoc
County, WI
90 A
#143 Racine
County, WI
90 A
#144 Slinger
County, WI
90 A
Frequently Asked Questions
How are city water quality rankings calculated in Wisconsin?
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 cities in Wisconsin?
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.