Linn County, Iowa
AQI 44 · Good44
Median AQI
70
90th Percentile
163
Max AQI
304
Days with Data
Ranked #9 of 15 counties in Iowa (by median AQI, lower is better)
Monthly Median AQI — 2025
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44
Median AQI
70
90th Percentile
163
Max AQI
304
Days with Data
Ranked #9 of 15 counties in Iowa (by median AQI, lower is better)
Click a bar to view that month's details