RANKABLE EPA COUNTY AQI
Randolph Air Quality - Illinois
EPA county-level evidence, NDS comparative intelligence, and 10 connected ZIP profiles.
Median AQI
44.0
Maximum AQI
161.0
Good-air-quality days
66.91%
Average PM2.5
8.285 ug/m3
NDS Air Quality Score
24.52
U.S. County Rank
903 of 1,049
Percentile
13.74
Grade
F
County status
Randolph is part of the governed NDS rankable EPA county universe.
Methodology
EPA AQI evidence used here is county-derived. ZIP profiles connect to this evidence through the governed NDS geography relationship.