# Counties in Michigan by highest daily Air Quality Index (US EPA), 2007

All 30 values come from U.S. Environmental Protection Agency for 2007, so the places are comparable. 23 counties have no value for that period and are not ranked.

- Indicator id: `aqi_max`
- Unit: index
- Definition: Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: highest daily AQI (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Publisher page: https://invokely.ai/en/publishers/environmental-protection-agency
- Retrieved: 2026-10-12
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/highest-daily-air-quality-index/michigan-counties

| Rank | Place | index |
|---:|---|---:|
| 1 | Allegan County | 204 |
| 2 | Berrien County | 201 |
| 3 | Macomb County | 187 |
| 4 | Wexford County | 182 |
| 5 | Wayne County | 179 |
| 6 | Huron County | 177 |
| 6 | Mason County | 177 |
| 6 | St. Clair County | 177 |
| 9 | Tuscola County | 172 |
| 10 | Muskegon County | 169 |
| 10 | Ottawa County | 169 |
| 12 | Schoolcraft County | 166 |
| 13 | Kent County | 164 |
| 14 | Genesee County | 161 |
| 14 | Manistee County | 161 |
| 16 | Lenawee County | 159 |
| 16 | Oakland County | 159 |
| 18 | Benzie County | 156 |
| 18 | Washtenaw County | 156 |
| 20 | Cass County | 151 |
| 21 | Clinton County | 150 |
| 22 | Ingham County | 147 |
| 22 | Kalamazoo County | 147 |
| 24 | Missaukee County | 143 |
| 25 | Leelanau County | 140 |
| 26 | Chippewa County | 136 |
| 27 | Monroe County | 112 |
| 28 | Bay County | 90 |
| 29 | Keweenaw County | 72 |
| 30 | Presque Isle County | 52 |