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
7.7 µg/m³
WHO guideline 15
PM10
9.3 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
8:00 PM
💨
PM2.5 7.7 µg/m³
32 Good
9:00 PM
💨
PM2.5 8.5 µg/m³
35 Good
10:00 PM
💨
PM2.5 9.1 µg/m³
38 Good
11:00 PM
💨
PM2.5 9.5 µg/m³
40 Good
12:00 AM
💨
PM2.5 9.9 µg/m³
41 Good
1:00 AM
💨
PM2.5 9.7 µg/m³
40 Good
2:00 AM
💨
PM2.5 8.6 µg/m³
36 Good
3:00 AM
💨
PM2.5 9.1 µg/m³
38 Good
4:00 AM
💨
PM2.5 10 µg/m³
42 Good
5:00 AM
💨
PM2.5 11.8 µg/m³
49 Good
6:00 AM
💨
PM2.5 13.4 µg/m³
54 Moderate
7:00 AM
💨
PM2.5 13.3 µg/m³
54 Moderate
Next few days daily max · US EPA AQI
Fri
💨
Moderate · UV Moderate
62
Sat
💨
Moderate · UV Moderate
70
Sun
💨
Moderate · UV High
74
Mon
💨
Moderate · UV Moderate
83
Tue
💨
Good · UV Moderate
50
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain