City Water Quality Rankings in Wisconsin
340 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#289
Cameron
County, WI
76 B
#290 Cashton
County, WI
76 B
#291 Fontana
County, WI
76 B
#292 Hillsboro
County, WI
76 B
#293 Johnson Creek
County, WI
76 B
#294 Lake Hallie
County, WI
76 B
#295 Rice Lake
County, WI
76 B
#296 Sussex
County, WI
76 B
#297 North Prairie
County, WI
75 B
#298 Oconto
County, WI
75 B
#299 Poynette
County, WI
75 B
#300 Prairie Du Sac
County, WI
75 B
#301 Sherwood
County, WI
75 B
#302 Lake Mills
County, WI
74 C
#303 Walworth
County, WI
74 C
#304 Cambridge
County, WI
73 C
#305 Glenwood City
County, WI
72 C
#306 Fall Creek
County, WI
71 C
#307 Odanah
County, WI
71 C
#308 Monona
County, WI
70 C
#309 New Lisbon
County, WI
69 C
#310 Lodi
County, WI
68 C
#311 Sharon
County, WI
68 C
#312 Williams Bay
County, WI
68 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.