Air quality in Altadena
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
32.6 µg/m³
WHO guideline 15
PM10
36.6 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 AM
💨
PM2.5 32.6 µg/m³
94Moderate
3:00 AM
💨
PM2.5 32.6 µg/m³
94Moderate
4:00 AM
💨
PM2.5 32.8 µg/m³
95Moderate
5:00 AM
💨
PM2.5 33.3 µg/m³
96Moderate
6:00 AM
💨
PM2.5 33.9 µg/m³
97Moderate
7:00 AM
💨
PM2.5 35 µg/m³
99Moderate
8:00 AM
💨
PM2.5 33.4 µg/m³
96Moderate
9:00 AM
💨
PM2.5 28.8 µg/m³
86Moderate
10:00 AM
💨
PM2.5 24.7 µg/m³
77Moderate
11:00 AM
💨
PM2.5 23.1 µg/m³
74Moderate
12:00 PM
💨
PM2.5 22.2 µg/m³
72Moderate
1:00 PM
💨
PM2.5 22.3 µg/m³
72Moderate
Next few days
daily max · US EPA AQI
Sun
💨
Unhealthy for Sensitive Groups · UV Very high
133
Mon
💨
Moderate · UV Very high
99
Tue
💨
Moderate · UV Very high
96
Wed
💨
Unhealthy for Sensitive Groups · UV Very high
102
Thu
💨
Unhealthy for Sensitive Groups · UV High
117