RANKABLE EPA COUNTY AQI
Washington Air Quality - Pennsylvania
EPA county-level evidence, NDS comparative intelligence, and 47 connected ZIP profiles.
Median AQI
42.0
Maximum AQI
100.0
Good-air-quality days
71.23%
Average PM2.5
6.699 ug/m3
NDS Air Quality Score
50.90
U.S. County Rank
555 of 1,049
Percentile
46.95
Grade
C
County status
Washington 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.