RANKABLE EPA COUNTY AQI
Sonoma Air Quality - California
EPA county-level evidence, NDS comparative intelligence, and 47 connected ZIP profiles.
Median AQI
9.0
Maximum AQI
39.0
Good-air-quality days
100.00%
Average PM2.5
3.435 ug/m3
NDS Air Quality Score
96.02
U.S. County Rank
4 of 1,049
Percentile
99.71
Grade
A+
County status
Sonoma 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.