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
17.3 µg/m³
WHO guideline 15
PM10
18.3 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
10:00 AM
💨
PM2.5 17.3 µg/m³
62 Moderate
11:00 AM
💨
PM2.5 15.9 µg/m³
59 Moderate
12:00 PM
💨
PM2.5 13.7 µg/m³
54 Moderate
1:00 PM
💨
PM2.5 12.6 µg/m³
52 Moderate
2:00 PM
💨
PM2.5 11.7 µg/m³
49 Good
3:00 PM
💨
PM2.5 10.7 µg/m³
45 Good
4:00 PM
💨
PM2.5 9.7 µg/m³
43 Good
5:00 PM
💨
PM2.5 9.2 µg/m³
43 Good
6:00 PM
💨
PM2.5 9.1 µg/m³
38 Good
7:00 PM
💨
PM2.5 9.7 µg/m³
40 Good
8:00 PM
💨
PM2.5 9.7 µg/m³
40 Good
9:00 PM
💨
PM2.5 9 µg/m³
38 Good
Next few days daily max · US EPA AQI
Thu
💨
Moderate · UV Moderate
66
Sat
💨
Moderate · UV Moderate
51
Sun
💨
Good · UV Moderate
38
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain