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
3 µg/m³
WHO guideline 15
PM10
3.7 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
1:00 PM
💨
PM2.5 3 µg/m³
26 Good
2:00 PM
💨
PM2.5 2.7 µg/m³
30 Good
3:00 PM
💨
PM2.5 3.3 µg/m³
33 Good
4:00 PM
💨
PM2.5 4.6 µg/m³
34 Good
5:00 PM
💨
PM2.5 6.1 µg/m³
35 Good
6:00 PM
💨
PM2.5 7.3 µg/m³
34 Good
7:00 PM
💨
PM2.5 8.4 µg/m³
35 Good
8:00 PM
💨
PM2.5 9.5 µg/m³
40 Good
9:00 PM
💨
PM2.5 10.2 µg/m³
43 Good
10:00 PM
💨
PM2.5 11.4 µg/m³
48 Good
11:00 PM
💨
PM2.5 12.9 µg/m³
53 Moderate
12:00 AM
💨
PM2.5 13.1 µg/m³
53 Moderate
Next few days daily max · US EPA AQI
Fri
💨
Moderate · UV Low
53
Sat
💨
Moderate · UV Low
54
Sun
💨
Good · UV Moderate
40
Mon
💨
Good · UV Moderate
40
JavaScript is needed for the map — the city links below work without it.
Precip NEXRAD · NOAA Temp Wind Clouds Terrain