RANKABLE EPA COUNTY AQI
Philadelphia Air Quality - Pennsylvania
EPA county-level evidence, NDS comparative intelligence, and 51 connected ZIP profiles.
Median AQI
50.0
Maximum AQI
147.0
Good-air-quality days
51.65%
Average PM2.5
8.409 ug/m3
NDS Air Quality Score
21.72
U.S. County Rank
937 of 1,049
Percentile
10.50
Grade
F
County status
Philadelphia 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.