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Counties with the Cleanest Air in Indiana

The top 25 of 33 Indiana counties on GIS Map, ranked by lowest median Air Quality Index, counting only counties that host an EPA air monitor.

#CountyMedian AQI
1Henry County
34
2Monroe County
34
3Spencer County
34
4Hendricks County
35
5Tippecanoe County
35
6Whitley County
35
7Boone County
36
8Carroll County
36
9Shelby County
36
10Wabash County
36
11Brown County
37
12Posey County
37
13Knox County
38
14Warrick County
38
15Dubois County
39
16Perry County
39
17LaPorte County
41
18Greene County
42
19Madison County
42
20Floyd County
43
21Bartholomew County
44
22Delaware County
44
23Hamilton County
44
24Howard County
44
25Porter County
44

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 Indiana”, https://gismap.land/rankings/indiana/cleanest-air-counties. Figures from EPA Air Quality Index annual summary (2024).

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