RANKABLE EPA COUNTY AQI
Winnebago Air Quality - Illinois
EPA county-level evidence, NDS comparative intelligence, and 16 connected ZIP profiles.
Median AQI
41.0
Maximum AQI
169.0
Good-air-quality days
67.68%
Average PM2.5
8.983 ug/m3
NDS Air Quality Score
25.75
U.S. County Rank
883 of 1,049
Percentile
15.65
Grade
F
County status
Winnebago 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.