RANKABLE EPA COUNTY AQI
Knox Air Quality - Tennessee
EPA county-level evidence, NDS comparative intelligence, and 30 connected ZIP profiles.
Median AQI
46.0
Maximum AQI
156.0
Good-air-quality days
61.17%
Average PM2.5
8.102 ug/m3
NDS Air Quality Score
28.02
U.S. County Rank
853 of 1,049
Percentile
18.51
Grade
F
County status
Knox 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.