| # | County | Median AQI |
|---|---|---|
| 1 | Wayne County | 55 |
| 2 | Kent County | 51 |
| 3 | Allegan County | 46 |
| 4 | Kalamazoo County | 45 |
| 5 | Oakland County | 45 |
| 6 | Lenawee County | 43 |
| 7 | Washtenaw County | 43 |
| 8 | Cass County | 42 |
| 9 | Genesee County | 42 |
| 10 | Macomb County | 42 |
| 11 | Berrien County | 41 |
| 12 | Ottawa County | 41 |
| 13 | St. Clair County | 41 |
| 14 | Ingham County | 39 |
| 15 | Benzie County | 38 |
| 16 | Clinton County | 38 |
| 17 | Huron County | 38 |
| 18 | Muskegon County | 38 |
| 19 | Bay County | 37 |
| 20 | Mason County | 37 |
| 21 | Missaukee County | 35 |
| 22 | Tuscola County | 34 |
| 23 | Wexford County | 34 |
| 24 | Manistee County | 33 |
| 25 | Schoolcraft County | 33 |
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 Michigan”, https://gismap.land/rankings/michigan/worst-air-quality-counties. Figures from EPA Air Quality Index annual summary (2024).
More Michigan rankings
Richest citiesMost expensive homesMost affordable homesHighest rentMost educatedHighest poverty rateMost densely populatedLargest by populationYoungestOldest by median ageFastest-growingFastest-shrinkingFastest-growing since 2010WarmestColdestSnowiestWettestDriestHighest hazard risk countiesLowest hazard risk countiesHighest expected lossesHighest radon potentialCleanest airWorst drought