Northampton County, Pennsylvania

AQI 39 · Good

YearMonth

39

Median AQI

62

90th Percentile

122

Max AQI

212

Days with Data

Ranked #13 of 37 counties in Pennsylvania (by median AQI, lower is better)

Monthly Median AQI — 2025

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AQI Category Breakdown

Adjacent Counties

Warren County, New Jersey Bucks County Carbon County Lehigh County Monroe County

External Links

Northampton County, Pennsylvania on Wikipedia