Air quality in Portland
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
7.2 µg/m³
WHO guideline 15
PM10
9.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 7.2 µg/m³
30Good
5:00 AM
💨
PM2.5 7.5 µg/m³
31Good
6:00 AM
💨
PM2.5 7.9 µg/m³
33Good
7:00 AM
💨
PM2.5 8.6 µg/m³
36Good
8:00 AM
💨
PM2.5 9.1 µg/m³
38Good
9:00 AM
💨
PM2.5 9.3 µg/m³
39Good
10:00 AM
💨
PM2.5 7.2 µg/m³
30Good
11:00 AM
💨
PM2.5 6 µg/m³
27Good
12:00 PM
💨
PM2.5 5.5 µg/m³
30Good
1:00 PM
💨
PM2.5 5 µg/m³
31Good
2:00 PM
💨
PM2.5 4.4 µg/m³
32Good
3:00 PM
💨
PM2.5 4.4 µg/m³
33Good
Next few days
daily max · US EPA AQI
Sat
💨
Good · UV Moderate
39
Sun
💨
Good · UV Moderate
50
Mon
💨
Moderate · UV Moderate
58
Tue
💨
Good · UV Moderate
37
Wed
💨
Good · UV Moderate
24