City Water Quality Rankings in Wisconsin
340 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#169
Hayward
County, WI
90 A
#170 Janesville
County, WI
90 A
#171 Lake Delton
County, WI
90 A
#172 Manitowoc
County, WI
90 A
#173 Pleasant Prairie
County, WI
90 A
#174 Spring Valley
County, WI
90 A
#175 Belgium
County, WI
89 B
#176 Black River Falls
County, WI
89 B
#177 Chilton
County, WI
89 B
#178 Cleveland
County, WI
89 B
#179 Hazel Green
County, WI
89 B
#180 Kimberly
County, WI
89 B
#181 Ripon
County, WI
89 B
#182 Slinger
County, WI
89 B
#183 Strum
County, WI
89 B
#184 Washburn
County, WI
89 B
#185 Albany
County, WI
88 B
#186 Baldwin
County, WI
88 B
#187 Balsam Lake
County, WI
88 B
#188 Bangor
County, WI
88 B
#189 Brookfield
County, WI
88 B
#190 Columbus
County, WI
88 B
#191 Delavan
County, WI
88 B
#192 Dodgeville
County, WI
88 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.