RANKABLE EPA COUNTY AQI
Washington Air Quality - Ohio
EPA county-level evidence, NDS comparative intelligence, and 12 connected ZIP profiles.
Median AQI
41.0
Maximum AQI
105.0
Good-air-quality days
86.73%
Average PM2.5
N/A
NDS Air Quality Score
51.41
U.S. County Rank
549 of 1,049
Percentile
47.52
Grade
C
County status
Washington is part of the governed NDS rankable EPA county universe.
Methodology
EPA AQI evidence used here is county-derived. ZIP profiles connect to this evidence through the governed NDS geography relationship.