Columbia County, Wisconsin
AQI 42 · Good42
Median AQI
54
90th Percentile
108
Max AQI
91
Days with Data
Ranked #27 of 29 counties in Wisconsin (by median AQI, lower is better)
Monthly Median AQI — 2025
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42
Median AQI
54
90th Percentile
108
Max AQI
91
Days with Data
Ranked #27 of 29 counties in Wisconsin (by median AQI, lower is better)
Click a bar to view that month's details