Air quality in Signal Hill
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
5.5 µg/m³
WHO guideline 15
PM10
8.6 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 AM
💨
PM2.5 5.5 µg/m³
33Good
1:00 AM
💨
PM2.5 5.7 µg/m³
34Good
2:00 AM
💨
PM2.5 6.1 µg/m³
34Good
3:00 AM
💨
PM2.5 6.9 µg/m³
35Good
4:00 AM
💨
PM2.5 7.7 µg/m³
35Good
5:00 AM
💨
PM2.5 11.3 µg/m³
47Good
6:00 AM
💨
PM2.5 9.2 µg/m³
38Good
7:00 AM
💨
PM2.5 8.8 µg/m³
37Good
8:00 AM
💨
PM2.5 8.3 µg/m³
37Good
9:00 AM
💨
PM2.5 7.9 µg/m³
37Good
10:00 AM
💨
PM2.5 6.5 µg/m³
37Good
11:00 AM
💨
PM2.5 5.7 µg/m³
37Good
Next few days
daily max · US EPA AQI
Wed
💨
Good · UV Moderate
47
Thu
💨
Good · UV Moderate
41
Fri
💨
Good · UV Moderate
35
Sat
💨
Good · UV Moderate
48
Sun
💨
Good · UV Moderate
35