Counties with the Worst Air Quality in South Dakota
The top 10 of 10 South Dakota counties on GIS Map, ranked by median Air Quality Index, counting only counties that host an EPA air monitor.
| # | County | Median AQI |
|---|---|---|
| 1 | Meade County | 45 |
| 2 | Custer County | 44 |
| 3 | Jackson County | 44 |
| 4 | Clay County | 39 |
| 5 | Codington County | 37 |
| 6 | Brookings County | 36 |
| 7 | Pennington County | 36 |
| 8 | Minnehaha County | 34 |
| 9 | Brown County | 24 |
| 10 | Hughes County | 8 |
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 South Dakota”, https://gismap.land/rankings/south-dakota/worst-air-quality-counties. Figures from EPA Air Quality Index annual summary (2024).
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