Sanders County, Montana
AQI 15 · Good15
Median AQI
21
90th Percentile
31
Max AQI
181
Days with Data
Ranked #11 of 23 counties in Montana (by median AQI, lower is better)
Monthly Median AQI — 2025
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15
Median AQI
21
90th Percentile
31
Max AQI
181
Days with Data
Ranked #11 of 23 counties in Montana (by median AQI, lower is better)
Click a bar to view that month's details