Union County, North Carolina
AQI 41 · Good41
Median AQI
50
90th Percentile
90
Max AQI
184
Days with Data
Ranked #21 of 34 counties in North Carolina (by median AQI, lower is better)
Monthly Median AQI — 2025
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41
Median AQI
50
90th Percentile
90
Max AQI
184
Days with Data
Ranked #21 of 34 counties in North Carolina (by median AQI, lower is better)
Click a bar to view that month's details