RANKABLE EPA COUNTY AQI
Marion Air Quality - Indiana
EPA county-level evidence, NDS comparative intelligence, and 38 connected ZIP profiles.
Median AQI
53.0
Maximum AQI
170.0
Good-air-quality days
43.28%
Average PM2.5
10.232 ug/m3
NDS Air Quality Score
14.41
U.S. County Rank
998 of 1,049
Percentile
4.68
Grade
F
County status
Marion is part of the governed NDS rankable EPA county universe.
Connected ZIP codes
Methodology
EPA AQI evidence used here is county-derived. ZIP profiles connect to this evidence through the governed NDS geography relationship.