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RankingsMissouriWorst air quality

Counties with the Worst Air Quality in Missouri

The top 19 of 19 Missouri counties on GIS Map, ranked by median Air Quality Index, counting only counties that host an EPA air monitor.

#CountyMedian AQI
1St. Louis County
54
2Jackson County
46
3Greene County
45
4Buchanan County
44
5St. Charles County
44
6Andrew County
42
7Cass County
42
8Lincoln County
42
9Perry County
42
10Clay County
41
11Clinton County
41
12Jasper County
41
13Callaway County
40
14Cedar County
40
15Jefferson County
40
16Boone County
39
17Monroe County
35
18Stoddard County
29
19Taney County
26

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 Worst Air Quality in Missouri”, https://gismap.land/rankings/missouri/worst-air-quality-counties. Figures from EPA Air Quality Index annual summary (2024).

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