RANKABLE EPA COUNTY AQI
Columbiana Air Quality - Ohio
EPA county-level evidence, NDS comparative intelligence, and 25 connected ZIP profiles.
Median AQI
12.0
Maximum AQI
31.0
Good-air-quality days
100.00%
Average PM2.5
N/A
NDS Air Quality Score
90.50
U.S. County Rank
43 of 1,049
Percentile
95.99
Grade
A+
County status
Columbiana 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.