Jefferson County, Ohio
AQI 50 · Good50
Median AQI
71
90th Percentile
101
Max AQI
273
Days with Data
Ranked #31 of 37 counties in Ohio (by median AQI, lower is better)
Monthly Median AQI — 2025
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50
Median AQI
71
90th Percentile
101
Max AQI
273
Days with Data
Ranked #31 of 37 counties in Ohio (by median AQI, lower is better)
Click a bar to view that month's details