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
3.3 µg/m³
WHO guideline 15
PM10
4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 PM
💨
PM2.5 3.3 µg/m³
34Good
8:00 PM
💨
PM2.5 3.1 µg/m³
31Good
9:00 PM
💨
PM2.5 2.8 µg/m³
29Good
10:00 PM
💨
PM2.5 2.8 µg/m³
28Good
11:00 PM
💨
PM2.5 2.9 µg/m³
28Good
12:00 AM
💨
PM2.5 2.9 µg/m³
27Good
1:00 AM
💨
PM2.5 2.9 µg/m³
26Good
2:00 AM
💨
PM2.5 3 µg/m³
26Good
3:00 AM
💨
PM2.5 3.1 µg/m³
24Good
4:00 AM
💨
PM2.5 3 µg/m³
23Good
5:00 AM
💨
PM2.5 3.1 µg/m³
22Good
6:00 AM
💨
PM2.5 3.2 µg/m³
20Good
Next few days
daily max · US EPA AQI
Thu
💨
Good · UV Moderate
46
Fri
💨
Moderate · UV High
61
Sun
💨
Good · UV Very high
43
Mon
💨
Good · UV Very high
17