RANKABLE EPA COUNTY AQI
Washington Air Quality - Arkansas
EPA county-level evidence, NDS comparative intelligence, and 17 connected ZIP profiles.
Median AQI
41.0
Maximum AQI
74.0
Good-air-quality days
83.15%
Average PM2.5
8.787 ug/m3
NDS Air Quality Score
49.73
U.S. County Rank
573 of 1,049
Percentile
45.23
Grade
C
County status
Washington 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.