City Water Quality Rankings in Wisconsin
340 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#313
Fond Du Lac
County, WI
67 C
#314 Little Chute
County, WI
67 C
#315 Darlington
County, WI
66 C
#316 Theresa
County, WI
66 C
#317 Bayfield
County, WI
65 C
#318 Rio
County, WI
64 C
#319 West Bend
County, WI
64 C
#320 Montello
County, WI
63 C
#321 Crandon
County, WI
61 C
#322 Grafton
County, WI
58 D
#323 Barneveld
County, WI
57 D
#324 Princeton
County, WI
57 D
#325 Green Bay
County, WI
51 D
#326 Waukesha
County, WI
50 D
#327 Augusta
County, WI
48 D
#328 Juneau
County, WI
47 D
#329 Tomah
County, WI
46 D
#330 Elkhorn
County, WI
44 F
#331 Pell Lake
County, WI
37 F
#332 Thorp
County, WI
37 F
#333 Antigo
County, WI
29 F
#334 Weyauwega
County, WI
29 F
#335 Ashland
County, WI
0 F
#336 Dickeyville
County, WI
0 F
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.