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
2.4 µg/m³
WHO guideline 15
PM10
2.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 AM
💨
PM2.5 2.4 µg/m³
40Good
6:00 AM
💨
PM2.5 2.3 µg/m³
40Good
7:00 AM
💨
PM2.5 2.3 µg/m³
39Good
8:00 AM
💨
PM2.5 2.3 µg/m³
38Good
9:00 AM
💨
PM2.5 2.6 µg/m³
36Good
10:00 AM
💨
PM2.5 2.8 µg/m³
36Good
11:00 AM
💨
PM2.5 3 µg/m³
37Good
12:00 PM
💨
PM2.5 3.3 µg/m³
40Good
1:00 PM
💨
PM2.5 3.6 µg/m³
42Good
2:00 PM
💨
PM2.5 3.9 µg/m³
43Good
3:00 PM
💨
PM2.5 4.3 µg/m³
45Good
4:00 PM
💨
PM2.5 4.4 µg/m³
46Good
Next few days
daily max · US EPA AQI
Sat
💨
Good · UV Moderate
41
Sun
💨
Good · UV Moderate
36
Mon
💨
Good · UV Moderate
38
Tue
💨
No data · UV Moderate
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