RANKABLE EPA COUNTY AQI
Franklin Air Quality - Massachusetts
EPA county-level evidence, NDS comparative intelligence, and 33 connected ZIP profiles.
Median AQI
40.0
Maximum AQI
114.0
Good-air-quality days
72.84%
Average PM2.5
7.245 ug/m3
NDS Air Quality Score
40.98
U.S. County Rank
690 of 1,049
Percentile
34.06
Grade
D
County status
Franklin 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.