Frederick County, Virginia
AQI 42 · Good42
Median AQI
62
90th Percentile
85
Max AQI
284
Days with Data
Ranked #28 of 30 counties in Virginia (by median AQI, lower is better)
Monthly Median AQI — 2025
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42
Median AQI
62
90th Percentile
85
Max AQI
284
Days with Data
Ranked #28 of 30 counties in Virginia (by median AQI, lower is better)
Click a bar to view that month's details