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