San Miguel County, Colorado
AQI 21 · Good21
Median AQI
44
90th Percentile
94
Max AQI
273
Days with Data
Ranked #4 of 27 counties in Colorado (by median AQI, lower is better)
Monthly Median AQI — 2025
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21
Median AQI
44
90th Percentile
94
Max AQI
273
Days with Data
Ranked #4 of 27 counties in Colorado (by median AQI, lower is better)
Click a bar to view that month's details