RANKABLE EPA COUNTY AQI
Franklin Air Quality - Washington
EPA county-level evidence, NDS comparative intelligence, and 5 connected ZIP profiles.
Median AQI
22.0
Maximum AQI
61.0
Good-air-quality days
93.70%
Average PM2.5
N/A
NDS Air Quality Score
77.39
U.S. County Rank
138 of 1,049
Percentile
86.93
Grade
A
County status
Franklin 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.