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
10.1 µg/m³
WHO guideline 15
PM10
12.2 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
10:00 PM
💨
PM2.5 10.1 µg/m³
42 Good
11:00 PM
💨
PM2.5 9.5 µg/m³
40 Good
12:00 AM
💨
PM2.5 9.3 µg/m³
39 Good
1:00 AM
💨
PM2.5 8.9 µg/m³
37 Good
2:00 AM
💨
PM2.5 9.1 µg/m³
38 Good
3:00 AM
💨
PM2.5 9.2 µg/m³
38 Good
4:00 AM
💨
PM2.5 9.9 µg/m³
41 Good
5:00 AM
💨
PM2.5 11.3 µg/m³
47 Good
6:00 AM
💨
PM2.5 12.6 µg/m³
52 Moderate
7:00 AM
💨
PM2.5 13.8 µg/m³
55 Moderate
8:00 AM
💨
PM2.5 10.3 µg/m³
43 Good
9:00 AM
💨
PM2.5 10 µg/m³
42 Good
Next few days daily max · US EPA AQI
Fri
💨
Moderate · UV Moderate
64
Sat
💨
Moderate · UV Moderate
75
Sun
💨
Moderate · UV Moderate
84
Mon
💨
Moderate · UV Moderate
85
Tue
💨
Moderate · UV Moderate
62
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain