RANKABLE EPA COUNTY AQI
Marshall Air Quality - West Virginia
EPA county-level evidence, NDS comparative intelligence, and 9 connected ZIP profiles.
Median AQI
41.0
Maximum AQI
81.0
Good-air-quality days
63.64%
Average PM2.5
8.492 ug/m3
NDS Air Quality Score
45.50
U.S. County Rank
629 of 1,049
Percentile
39.89
Grade
D
County status
Marshall is part of the governed NDS rankable EPA county universe.
Methodology
EPA AQI evidence used here is county-derived. ZIP profiles connect to this evidence through the governed NDS geography relationship.