WaterQ

City Water Quality Rankings in Wisconsin

340 cities ranked by drinking water quality.

All States AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY

Popular city water quality comparisons

Algoma, WI vs Baraboo, WI Compare → Bristol, WI vs Brodhead, WI Compare → Chippewa Falls, WI vs Cumberland, WI Compare → Durand, WI vs Eau Claire, WI Compare →

Trending Cities

Fairbanks, AK Fresno, CA San Jose, CA Sacramento, CA San Francisco, CA Houston, TX Fargo, ND
#97
Cross Plains
County, WI
94 A
#98
Cudahy
County, WI
94 A
#99
East Troy
County, WI
94 A
#100
Frederic
County, WI
94 A
#101
Hammond
County, WI
94 A
#102
Hilbert
County, WI
94 A
#103
Independence
County, WI
94 A
#104
Kiel
County, WI
94 A
#105
Markesan
County, WI
94 A
#106
Muscoda
County, WI
94 A
#107
Neenah
County, WI
94 A
#108
Port Edwards
County, WI
94 A
#109
Port Washington
County, WI
94 A
#110
Shorewood
County, WI
94 A
#111
South Milwaukee
County, WI
94 A
#112
Wauwatosa
County, WI
94 A
#113
Wisconsin Rapids
County, WI
94 A
#114
Adams
County, WI
93 A
#115
Grantsburg
County, WI
93 A
#116
Lomira
County, WI
93 A
#117
New Berlin
County, WI
93 A
#118
New Glarus
County, WI
93 A
#119
Oak Creek
County, WI
93 A
#120
Phillips
County, WI
93 A

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.

Explore More Water Quality Data

State Rankings National Rankings Compare Cities All Water Systems