RANKABLE EPA COUNTY AQI
Knox Air Quality - Maine
EPA county-level evidence, NDS comparative intelligence, and 22 connected ZIP profiles.
Median AQI
34.0
Maximum AQI
77.0
Good-air-quality days
97.34%
Average PM2.5
N/A
NDS Air Quality Score
77.65
U.S. County Rank
135 of 1,049
Percentile
87.21
Grade
A
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.