RANKABLE EPA COUNTY AQI
Colusa Air Quality - California
EPA county-level evidence, NDS comparative intelligence, and 11 connected ZIP profiles.
Median AQI
39.0
Maximum AQI
96.0
Good-air-quality days
84.91%
Average PM2.5
4.312 ug/m3
NDS Air Quality Score
69.21
U.S. County Rank
255 of 1,049
Percentile
75.67
Grade
B
County status
Colusa is part of the governed NDS rankable EPA county universe.
Methodology
EPA AQI evidence used here is county-derived. ZIP profiles connect to this evidence through the governed NDS geography relationship.