Brookings County, South Dakota

AQI 48 · Good

YearMonth

48

Median AQI

73

90th Percentile

154

Max AQI

181

Days with Data

Ranked #10 of 10 counties in South Dakota (by median AQI, lower is better)

Monthly Median AQI — 2025

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AQI Category Breakdown

Adjacent Counties

Lincoln County, Minnesota Deuel County Hamlin County Kingsbury County Lake County Moody County

External Links

Brookings County, South Dakota on Wikipedia