RANKABLE EPA COUNTY AQI
Columbia Air Quality - Oregon
EPA county-level evidence, NDS comparative intelligence, and 8 connected ZIP profiles.
Median AQI
25.0
Maximum AQI
69.0
Good-air-quality days
96.69%
Average PM2.5
N/A
NDS Air Quality Score
82.80
U.S. County Rank
102 of 1,049
Percentile
90.36
Grade
A
County status
Columbia 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.