RANKABLE EPA COUNTY AQI
Armstrong Air Quality - Pennsylvania
EPA county-level evidence, NDS comparative intelligence, and 36 connected ZIP profiles.
Median AQI
42.0
Maximum AQI
93.0
Good-air-quality days
68.10%
Average PM2.5
7.661 ug/m3
NDS Air Quality Score
46.79
U.S. County Rank
614 of 1,049
Percentile
41.32
Grade
C
County status
Armstrong 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.