Marquette County, Michigan
AQI 18 · Good18
Median AQI
56
90th Percentile
183
Max AQI
123
Days with Data
Ranked #2 of 27 counties in Michigan (by median AQI, lower is better)
Monthly Median AQI — 2025
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18
Median AQI
56
90th Percentile
183
Max AQI
123
Days with Data
Ranked #2 of 27 counties in Michigan (by median AQI, lower is better)
Click a bar to view that month's details