Coos County, New Hampshire
AQI 40 · Good40
Median AQI
58
90th Percentile
119
Max AQI
274
Days with Data
Ranked #7 of 7 counties in New Hampshire (by median AQI, lower is better)
Monthly Median AQI — 2025
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40
Median AQI
58
90th Percentile
119
Max AQI
274
Days with Data
Ranked #7 of 7 counties in New Hampshire (by median AQI, lower is better)
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