Air quality in Union
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
8.1 µg/m³
WHO guideline 15
PM10
9.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 PM
💨
PM2.5 8.1 µg/m³
36Good
10:00 PM
💨
PM2.5 8.1 µg/m³
34Good
11:00 PM
💨
PM2.5 8.5 µg/m³
35Good
12:00 AM
💨
PM2.5 9 µg/m³
38Good
1:00 AM
💨
PM2.5 9.5 µg/m³
40Good
2:00 AM
💨
PM2.5 10.1 µg/m³
42Good
3:00 AM
💨
PM2.5 10.6 µg/m³
44Good
4:00 AM
💨
PM2.5 11 µg/m³
46Good
5:00 AM
💨
PM2.5 11.5 µg/m³
48Good
6:00 AM
💨
PM2.5 12 µg/m³
50Good
7:00 AM
💨
PM2.5 12.2 µg/m³
51Moderate
8:00 AM
💨
PM2.5 12.6 µg/m³
52Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
60
Tue
💨
Moderate · UV Very high
83
Wed
💨
Moderate · UV Very high
98
Thu
💨
Moderate · UV Very high
100
Fri
💨
Good · UV Very high
40