RANKABLE EPA COUNTY AQI
San Juan Air Quality - Colorado
EPA county-level evidence, NDS comparative intelligence, and 1 connected ZIP profiles.
Median AQI
4.0
Maximum AQI
13.0
Good-air-quality days
100.00%
Average PM2.5
N/A
NDS Air Quality Score
92.35
U.S. County Rank
25 of 1,049
Percentile
97.71
Grade
A+
County status
San Juan 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.