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
17.5 µg/m³
WHO guideline 15
PM10
20.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 PM
💨
PM2.5 17.5 µg/m³
62Moderate
7:00 PM
💨
PM2.5 17.4 µg/m³
62Moderate
8:00 PM
💨
PM2.5 16.8 µg/m³
61Moderate
9:00 PM
💨
PM2.5 16.5 µg/m³
60Moderate
10:00 PM
💨
PM2.5 16.6 µg/m³
60Moderate
11:00 PM
💨
PM2.5 16.8 µg/m³
61Moderate
12:00 AM
💨
PM2.5 17.1 µg/m³
62Moderate
1:00 AM
💨
PM2.5 17 µg/m³
61Moderate
2:00 AM
💨
PM2.5 17.3 µg/m³
62Moderate
3:00 AM
💨
PM2.5 17.8 µg/m³
63Moderate
4:00 AM
💨
PM2.5 18.6 µg/m³
65Moderate
5:00 AM
💨
PM2.5 20 µg/m³
68Moderate
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV Very high
68
Sun
💨
Moderate · UV Very high
95
Mon
💨
Unhealthy for Sensitive Groups · UV Extreme
103
Tue
💨
Moderate · UV Very high
88
Wed
💨
Moderate · UV Very high
80