Peoria County, Illinois
AQI 47 · Good47
Median AQI
67
90th Percentile
154
Max AQI
270
Days with Data
Ranked #21 of 23 counties in Illinois (by median AQI, lower is better)
Monthly Median AQI — 2025
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47
Median AQI
67
90th Percentile
154
Max AQI
270
Days with Data
Ranked #21 of 23 counties in Illinois (by median AQI, lower is better)
Click a bar to view that month's details