Custer County, Idaho
AQI 3 · Good3
Median AQI
9
90th Percentile
13
Max AQI
20
Days with Data
Ranked #1 of 19 counties in Idaho (by median AQI, lower is better)
Monthly Median AQI — 2025
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3
Median AQI
9
90th Percentile
13
Max AQI
20
Days with Data
Ranked #1 of 19 counties in Idaho (by median AQI, lower is better)
Click a bar to view that month's details