Marion County, Indiana
AQI 53 · Moderate53
Median AQI
69
90th Percentile
170
Max AQI
305
Days with Data
Ranked #33 of 33 counties in Indiana (by median AQI, lower is better)
Monthly Median AQI — 2025
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53
Median AQI
69
90th Percentile
170
Max AQI
305
Days with Data
Ranked #33 of 33 counties in Indiana (by median AQI, lower is better)
Click a bar to view that month's details