RANKABLE EPA COUNTY AQI
Marion Air Quality - Oregon
EPA county-level evidence, NDS comparative intelligence, and 23 connected ZIP profiles.
Median AQI
34.0
Maximum AQI
85.0
Good-air-quality days
85.08%
Average PM2.5
3.462 ug/m3
NDS Air Quality Score
71.03
U.S. County Rank
224 of 1,049
Percentile
78.63
Grade
B
County status
Marion 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.