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.
US AQI · EPA
142
Unhealthy for Sensitive Groups
PM2.5
10.7 µg/m³
WHO guideline 15
PM10
11.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 PM
💨
PM2.5 10.7 µg/m³
142Unhealthy for Sensitive Groups
6:00 PM
💨
PM2.5 10.8 µg/m³
136Unhealthy for Sensitive Groups
7:00 PM
💨
PM2.5 11.1 µg/m³
126Unhealthy for Sensitive Groups
8:00 PM
💨
PM2.5 14.7 µg/m³
106Unhealthy for Sensitive Groups
9:00 PM
💨
PM2.5 19 µg/m³
73Moderate
10:00 PM
💨
PM2.5 21.8 µg/m³
71Moderate
11:00 PM
💨
PM2.5 22.1 µg/m³
72Moderate
12:00 AM
💨
PM2.5 17.2 µg/m³
62Moderate
1:00 AM
💨
PM2.5 13.4 µg/m³
54Moderate
2:00 AM
💨
PM2.5 12.6 µg/m³
52Moderate
3:00 AM
💨
PM2.5 12.3 µg/m³
51Moderate
4:00 AM
💨
PM2.5 12 µg/m³
50Good
Next few days
daily max · US EPA AQI
Tue
💨
Unhealthy for Sensitive Groups · UV Very high
142
Wed
💨
Unhealthy for Sensitive Groups · UV High
129
Thu
💨
Unhealthy for Sensitive Groups · UV Very high
104
Fri
💨
Unhealthy for Sensitive Groups · UV High
129
Sat
💨
Moderate · UV High
85