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RankingsWyomingWorst air quality

Counties with the Worst Air Quality in Wyoming

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

#CountyMedian AQI
1Albany County
50
2Fremont County
49
3Sublette County
46
4Laramie County
45
5Sweetwater County
45
6Campbell County
44
7Sheridan County
44
8Teton County
44
9Natrona County
43
10Converse County
41
11Johnson County
40
12Big Horn County
39
13Weston County
39
14Lincoln County
31
15Platte County
19
16Park County
13
17Carbon County
8
18Washakie County
8
19Uinta County
7

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

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