RANKABLE EPA COUNTY AQI
Multnomah Air Quality - Oregon
EPA county-level evidence, NDS comparative intelligence, and 52 connected ZIP profiles.
Median AQI
38.0
Maximum AQI
87.0
Good-air-quality days
82.42%
Average PM2.5
5.807 ug/m3
NDS Air Quality Score
57.92
U.S. County Rank
446 of 1,049
Percentile
57.35
Grade
C
County status
Multnomah 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.