City Water Quality Rankings in Wisconsin
269 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#217
Galesville
County, WI
79 B
#218 Abbotsford
County, WI
78 B
#219 Amery
County, WI
78 B
#220 Cedarburg
County, WI
78 B
#221 Eagle
County, WI
78 B
#222 Kewaunee
County, WI
78 B
#223 Madison
County, WI
78 B
#224 Theresa
County, WI
78 B
#225 Hazel Green
County, WI
77 B
#226 Cameron
County, WI
76 B
#227 Cashton
County, WI
76 B
#228 Hortonville
County, WI
76 B
#229 Jackson
County, WI
76 B
#230 Rice Lake
County, WI
76 B
#231 River Falls
County, WI
76 B
#232 North Fond Du Lac
County, WI
75 B
#233 North Prairie
County, WI
75 B
#234 Oconto
County, WI
75 B
#235 Johnson Creek
County, WI
74 C
#236 Walworth
County, WI
74 C
#237 Poynette
County, WI
73 C
#238 Athens
County, WI
72 C
#239 Lake Mills
County, WI
72 C
#240 Merrill
County, WI
72 C
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.