| # | County | Median AQI |
|---|---|---|
| 1 | Keweenaw County | 12 |
| 2 | Monroe County | 18 |
| 3 | Marquette County | 19 |
| 4 | Manistee County | 33 |
| 5 | Schoolcraft County | 33 |
| 6 | Tuscola County | 34 |
| 7 | Wexford County | 34 |
| 8 | Missaukee County | 35 |
| 9 | Bay County | 37 |
| 10 | Mason County | 37 |
| 11 | Benzie County | 38 |
| 12 | Clinton County | 38 |
| 13 | Huron County | 38 |
| 14 | Muskegon County | 38 |
| 15 | Ingham County | 39 |
| 16 | Berrien County | 41 |
| 17 | Ottawa County | 41 |
| 18 | St. Clair County | 41 |
| 19 | Cass County | 42 |
| 20 | Genesee County | 42 |
| 21 | Macomb County | 42 |
| 22 | Lenawee County | 43 |
| 23 | Washtenaw County | 43 |
| 24 | Kalamazoo County | 45 |
| 25 | Oakland 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 Michigan”, https://gismap.land/rankings/michigan/cleanest-air-counties. Figures from EPA Air Quality Index annual summary (2024).
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