RANKABLE EPA COUNTY AQI
Jefferson Air Quality - Colorado
EPA county-level evidence, NDS comparative intelligence, and 21 connected ZIP profiles.
Median AQI
51.0
Maximum AQI
119.0
Good-air-quality days
46.52%
Average PM2.5
N/A
NDS Air Quality Score
11.20
U.S. County Rank
1,018 of 1,049
Percentile
2.77
Grade
F
County status
Jefferson 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.