Simpson County, Kentucky
AQI 39 · Good39
Median AQI
50
90th Percentile
74
Max AQI
121
Days with Data
Ranked #15 of 25 counties in Kentucky (by median AQI, lower is better)
Monthly Median AQI — 2025
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39
Median AQI
50
90th Percentile
74
Max AQI
121
Days with Data
Ranked #15 of 25 counties in Kentucky (by median AQI, lower is better)
Click a bar to view that month's details