RANKABLE EPA COUNTY AQI
Polk Air Quality - Texas
EPA county-level evidence, NDS comparative intelligence, and 11 connected ZIP profiles.
Median AQI
33.0
Maximum AQI
105.0
Good-air-quality days
94.62%
Average PM2.5
N/A
NDS Air Quality Score
68.22
U.S. County Rank
271 of 1,049
Percentile
74.14
Grade
B
County status
Polk 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.