RANKABLE EPA COUNTY AQI
Cass Air Quality - North Dakota
EPA county-level evidence, NDS comparative intelligence, and 35 connected ZIP profiles.
Median AQI
39.0
Maximum AQI
192.0
Good-air-quality days
73.22%
Average PM2.5
9.735 ug/m3
NDS Air Quality Score
34.31
U.S. County Rank
781 of 1,049
Percentile
25.38
Grade
D
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.