City Water Quality Rankings in Wisconsin
269 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#169
Whitewater
County, WI
88 B
#170 Hurley
County, WI
87 B
#171 Oconto Falls
County, WI
87 B
#172 Oregon
County, WI
87 B
#173 Pleasant Prairie
County, WI
87 B
#174 Washburn
County, WI
87 B
#175 Cottage Grove
County, WI
86 B
#176 Cuba City
County, WI
86 B
#177 Mauston
County, WI
86 B
#178 Menomonee Falls
County, WI
86 B
#179 Milton
County, WI
86 B
#180 Onalaska
County, WI
86 B
#181 Orfordville
County, WI
86 B
#182 Osseo
County, WI
86 B
#183 Oxford
County, WI
86 B
#184 Watertown
County, WI
86 B
#185 Windsor
County, WI
86 B
#186 Wisconsin Dells
County, WI
86 B
#187 Black River Falls
County, WI
85 B
#188 Crivitz
County, WI
85 B
#189 Colfax
County, WI
84 B
#190 Deerfield
County, WI
84 B
#191 Franklin
County, WI
84 B
#192 Prescott
County, WI
84 B
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.