Air quality in Union City
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
7.1 µg/m³
WHO guideline 15
PM10
7.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 PM
💨
PM2.5 7.1 µg/m³
33Good
1:00 PM
💨
PM2.5 7.5 µg/m³
41Good
2:00 PM
💨
PM2.5 7.8 µg/m³
46Good
3:00 PM
💨
PM2.5 8.2 µg/m³
49Good
4:00 PM
💨
PM2.5 8.5 µg/m³
50Good
5:00 PM
💨
PM2.5 8.6 µg/m³
49Good
6:00 PM
💨
PM2.5 8.6 µg/m³
44Good
7:00 PM
💨
PM2.5 8.2 µg/m³
38Good
8:00 PM
💨
PM2.5 8.4 µg/m³
35Good
9:00 PM
💨
PM2.5 9.7 µg/m³
40Good
10:00 PM
💨
PM2.5 10.3 µg/m³
43Good
11:00 PM
💨
PM2.5 10.7 µg/m³
45Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV Moderate
65
Sun
💨
Moderate · UV High
85
Mon
💨
Unhealthy for Sensitive Groups · UV High
119
Tue
💨
No data · UV Very high
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