RANKABLE EPA COUNTY AQI
Umatilla Air Quality - Oregon
EPA county-level evidence, NDS comparative intelligence, and 10 connected ZIP profiles.
Median AQI
39.0
Maximum AQI
79.0
Good-air-quality days
79.56%
Average PM2.5
N/A
NDS Air Quality Score
53.45
U.S. County Rank
512 of 1,049
Percentile
51.05
Grade
C
County status
Umatilla 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.