| # | County | Median AQI |
|---|---|---|
| 1 | Clark County | 35 |
| 2 | Polk County | 38 |
| 3 | Jackson County | 39 |
| 4 | Newton County | 39 |
| 5 | Ashley County | 41 |
| 6 | Crittenden County | 41 |
| 7 | Washington County | 41 |
| 8 | Arkansas County | 46 |
| 9 | Union County | 49 |
| 10 | Garland County | 50 |
| 11 | Pulaski County | 55 |
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 Arkansas”, https://gismap.land/rankings/arkansas/cleanest-air-counties. Figures from EPA Air Quality Index annual summary (2024).
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