RANKABLE EPA COUNTY AQI
Union Air Quality - Arkansas
EPA county-level evidence, NDS comparative intelligence, and 9 connected ZIP profiles.
Median AQI
52.0
Maximum AQI
70.0
Good-air-quality days
43.96%
Average PM2.5
9.719 ug/m3
NDS Air Quality Score
18.59
U.S. County Rank
967 of 1,049
Percentile
7.63
Grade
F
County status
Union 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.