RANKABLE EPA COUNTY AQI
Washington Air Quality - Maine
EPA county-level evidence, NDS comparative intelligence, and 30 connected ZIP profiles.
Median AQI
36.0
Maximum AQI
100.0
Good-air-quality days
89.86%
Average PM2.5
5.073 ug/m3
NDS Air Quality Score
63.66
U.S. County Rank
345 of 1,049
Percentile
67.08
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.