RANKABLE EPA COUNTY AQI
Skagit Air Quality - Washington
EPA county-level evidence, NDS comparative intelligence, and 16 connected ZIP profiles.
Median AQI
22.0
Maximum AQI
55.0
Good-air-quality days
97.10%
Average PM2.5
4.263 ug/m3
NDS Air Quality Score
91.53
U.S. County Rank
33 of 1,049
Percentile
96.95
Grade
A+
County status
Skagit 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.