Columbiana County, Ohio
AQI 12 · Good12
Median AQI
24
90th Percentile
31
Max AQI
46
Days with Data
Ranked #1 of 37 counties in Ohio (by median AQI, lower is better)
Monthly Median AQI — 2025
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12
Median AQI
24
90th Percentile
31
Max AQI
46
Days with Data
Ranked #1 of 37 counties in Ohio (by median AQI, lower is better)
Click a bar to view that month's details