Air quality in Washington
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
3.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
11:00 AM
💨
PM2.5 3 µg/m³
41Good
12:00 PM
💨
PM2.5 3.2 µg/m³
44Good
1:00 PM
💨
PM2.5 3.2 µg/m³
45Good
2:00 PM
💨
PM2.5 3.2 µg/m³
46Good
3:00 PM
💨
PM2.5 3.1 µg/m³
48Good
4:00 PM
💨
PM2.5 3.1 µg/m³
48Good
5:00 PM
💨
PM2.5 3.2 µg/m³
47Good
6:00 PM
💨
PM2.5 3.3 µg/m³
43Good
7:00 PM
💨
PM2.5 3.8 µg/m³
37Good
8:00 PM
💨
PM2.5 3.9 µg/m³
31Good
9:00 PM
💨
PM2.5 3.7 µg/m³
27Good
10:00 PM
💨
PM2.5 3.9 µg/m³
24Good
Next few days
daily max · US EPA AQI
Sun
💨
Good · UV Very high
48
Mon
💨
Moderate · UV Very high
63
Tue
💨
Moderate · UV Very high
56
Wed
💨
Moderate · UV Very high
66
Thu
💨
Good · UV Very high
20