RANKABLE EPA COUNTY AQI
Johnson Air Quality - Iowa
EPA county-level evidence, NDS comparative intelligence, and 17 connected ZIP profiles.
Median AQI
36.0
Maximum AQI
159.0
Good-air-quality days
71.05%
Average PM2.5
8.106 ug/m3
NDS Air Quality Score
48.02
U.S. County Rank
593 of 1,049
Percentile
43.32
Grade
C
County status
Johnson 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.