Air quality in SeaTac
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
11.7 µg/m³
WHO guideline 15
PM10
12.8 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
3:00 PM
💨
PM2.5 11.7 µg/m³
49 Good
4:00 PM
💨
PM2.5 13.4 µg/m³
54 Moderate
5:00 PM
💨
PM2.5 13.8 µg/m³
55 Moderate
6:00 PM
💨
PM2.5 12.2 µg/m³
51 Moderate
7:00 PM
💨
PM2.5 10.9 µg/m³
45 Good
8:00 PM
💨
PM2.5 10.4 µg/m³
43 Good
9:00 PM
💨
PM2.5 9.8 µg/m³
41 Good
10:00 PM
💨
PM2.5 9.3 µg/m³
39 Good
11:00 PM
💨
PM2.5 8.6 µg/m³
36 Good
12:00 AM
💨
PM2.5 8.5 µg/m³
35 Good
1:00 AM
💨
PM2.5 7.9 µg/m³
33 Good
2:00 AM
💨
PM2.5 6.1 µg/m³
31 Good
Next few days daily max · US EPA AQI
Fri
💨
Moderate · UV Low
68
Sun
💨
Good · UV Moderate
48
Mon
💨
Moderate · UV Moderate
53
Tue
💨
Good · UV Moderate
46
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain