RANKABLE EPA COUNTY AQI
Marion Air Quality - West Virginia
EPA county-level evidence, NDS comparative intelligence, and 17 connected ZIP profiles.
Median AQI
34.0
Maximum AQI
70.0
Good-air-quality days
72.88%
Average PM2.5
7.047 ug/m3
NDS Air Quality Score
66.97
U.S. County Rank
296 of 1,049
Percentile
71.76
Grade
B
County status
Marion 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.