RANKABLE EPA COUNTY AQI
St. Clair Air Quality - Michigan
EPA county-level evidence, NDS comparative intelligence, and 19 connected ZIP profiles.
Median AQI
39.0
Maximum AQI
147.0
Good-air-quality days
74.26%
Average PM2.5
7.418 ug/m3
NDS Air Quality Score
47.55
U.S. County Rank
603 of 1,049
Percentile
42.37
Grade
C
County status
St. Clair 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.