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
15.1 µg/m³
WHO guideline 15
PM10
19 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 AM
💨
PM2.5 15.1 µg/m³
57Moderate
6:00 AM
💨
PM2.5 15.3 µg/m³
58Moderate
7:00 AM
💨
PM2.5 15.7 µg/m³
59Moderate
8:00 AM
💨
PM2.5 14.6 µg/m³
56Moderate
9:00 AM
💨
PM2.5 12.7 µg/m³
52Moderate
10:00 AM
💨
PM2.5 12.5 µg/m³
52Moderate
11:00 AM
💨
PM2.5 12.4 µg/m³
52Moderate
12:00 PM
💨
PM2.5 12.2 µg/m³
51Moderate
1:00 PM
💨
PM2.5 12.4 µg/m³
52Moderate
2:00 PM
💨
PM2.5 13.3 µg/m³
55Moderate
3:00 PM
💨
PM2.5 14.8 µg/m³
61Moderate
4:00 PM
💨
PM2.5 16.3 µg/m³
65Moderate
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV Very high
73
Thu
💨
Moderate · UV Very high
75
Fri
💨
Moderate · UV Very high
59
Sat
💨
Moderate · UV Very high
81
Sun
💨
Moderate · UV High
60