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Counties with the Cleanest Air in Wisconsin

The top 25 of 29 Wisconsin counties on GIS Map, ranked by lowest median Air Quality Index, counting only counties that host an EPA air monitor.

#CountyMedian AQI
1Monroe County
23
2Jackson County
27
3Ashland County
34
4Taylor County
34
5Grant County
36
6Brown County
37
7Door County
37
8Forest County
37
9La Crosse County
37
10Marathon County
37
11Outagamie County
37
12Ozaukee County
37
13Sauk County
37
14Vilas County
37
15Columbia County
38
16Dodge County
38
17Eau Claire County
38
18Fond du Lac County
38
19Jefferson County
39
20Kewaunee County
39
21Manitowoc County
39
22Sheboygan County
40
23Kenosha County
41
24Rock County
41
25Dane County
42

Source: EPA Air Quality Index annual summary (2024). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Cleanest Air in Wisconsin”, https://gismap.land/rankings/wisconsin/cleanest-air-counties. Figures from EPA Air Quality Index annual summary (2024).

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