Calvert County, Maryland
AQI 38 · Good38
Median AQI
48
90th Percentile
77
Max AQI
240
Days with Data
Ranked #2 of 16 counties in Maryland (by median AQI, lower is better)
Monthly Median AQI — 2025
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38
Median AQI
48
90th Percentile
77
Max AQI
240
Days with Data
Ranked #2 of 16 counties in Maryland (by median AQI, lower is better)
Click a bar to view that month's details