RANKABLE EPA COUNTY AQI
Navajo Air Quality - Arizona
EPA county-level evidence, NDS comparative intelligence, and 24 connected ZIP profiles.
Median AQI
12.0
Maximum AQI
53.0
Good-air-quality days
99.63%
Average PM2.5
N/A
NDS Air Quality Score
95.66
U.S. County Rank
5 of 1,049
Percentile
99.62
Grade
A+
County status
Navajo 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.