Penobscot County, Maine
AQI 34 · Good34
Median AQI
57
90th Percentile
115
Max AQI
303
Days with Data
Ranked #2 of 11 counties in Maine (by median AQI, lower is better)
Monthly Median AQI — 2025
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34
Median AQI
57
90th Percentile
115
Max AQI
303
Days with Data
Ranked #2 of 11 counties in Maine (by median AQI, lower is better)
Click a bar to view that month's details