RANKABLE EPA COUNTY AQI
Cass Air Quality - Minnesota
EPA county-level evidence, NDS comparative intelligence, and 21 connected ZIP profiles.
Median AQI
22.0
Maximum AQI
55.0
Good-air-quality days
94.44%
Average PM2.5
4.591 ug/m3
NDS Air Quality Score
89.67
U.S. County Rank
46 of 1,049
Percentile
95.71
Grade
A+
County status
Cass 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.