Berkshire County, Massachusetts

AQI 41 · Good

YearMonth

41

Median AQI

63

90th Percentile

124

Max AQI

243

Days with Data

Ranked #7 of 13 counties in Massachusetts (by median AQI, lower is better)

Monthly Median AQI — 2025

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AQI Category Breakdown

Adjacent Counties

Litchfield County, Connecticut Franklin County Hampden County Hampshire County Columbia County, New York Dutchess County, New York Rensselaer County, New York Bennington County, Vermont

External Links

Berkshire County, Massachusetts on Wikipedia