Air quality in Portola Hills
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
13.4 µg/m³
WHO guideline 15
PM10
17.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
11:00 AM
💨
PM2.5 13.4 µg/m³
54Moderate
12:00 PM
💨
PM2.5 14.7 µg/m³
56Moderate
1:00 PM
💨
PM2.5 17.1 µg/m³
62Moderate
2:00 PM
💨
PM2.5 20 µg/m³
68Moderate
3:00 PM
💨
PM2.5 23.2 µg/m³
74Moderate
4:00 PM
💨
PM2.5 24.4 µg/m³
77Moderate
5:00 PM
💨
PM2.5 24.7 µg/m³
77Moderate
6:00 PM
💨
PM2.5 24 µg/m³
76Moderate
7:00 PM
💨
PM2.5 22.6 µg/m³
73Moderate
8:00 PM
💨
PM2.5 21.3 µg/m³
70Moderate
9:00 PM
💨
PM2.5 19.9 µg/m³
67Moderate
10:00 PM
💨
PM2.5 19.3 µg/m³
66Moderate
Next few days
daily max · US EPA AQI
Fri
💨
Moderate · UV Very high
77
Sat
💨
Moderate · UV High
94
Sun
💨
Moderate · UV Moderate
100
Mon
💨
Moderate · UV Very high
86
Tue
💨
Unhealthy for Sensitive Groups · UV High
106