RANKABLE EPA COUNTY AQI
Polk Air Quality - Arkansas
EPA county-level evidence, NDS comparative intelligence, and 7 connected ZIP profiles.
Median AQI
40.0
Maximum AQI
119.0
Good-air-quality days
81.18%
Average PM2.5
9.273 ug/m3
NDS Air Quality Score
44.18
U.S. County Rank
652 of 1,049
Percentile
37.69
Grade
D
County status
Polk 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.