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
12 µg/m³
WHO guideline 15
PM10
14.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 PM
💨
PM2.5 12 µg/m³
50Good
11:00 PM
💨
PM2.5 11.4 µg/m³
48Good
12:00 AM
💨
PM2.5 11.1 µg/m³
46Good
1:00 AM
💨
PM2.5 10.8 µg/m³
45Good
2:00 AM
💨
PM2.5 10.6 µg/m³
44Good
3:00 AM
💨
PM2.5 10.6 µg/m³
44Good
4:00 AM
💨
PM2.5 10.4 µg/m³
43Good
5:00 AM
💨
PM2.5 10.8 µg/m³
45Good
6:00 AM
💨
PM2.5 11.2 µg/m³
47Good
7:00 AM
💨
PM2.5 11.4 µg/m³
48Good
8:00 AM
💨
PM2.5 11 µg/m³
46Good
9:00 AM
💨
PM2.5 10.6 µg/m³
44Good
Next few days
daily max · US EPA AQI
Thu
💨
Moderate · UV Moderate
61
Fri
💨
Moderate · UV Moderate
63
Sat
💨
Moderate · UV High
60
Sun
💨
Moderate · UV High
51
Mon
💨
Good · UV Moderate
36