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
4.8 µg/m³
WHO guideline 15
PM10
9.6 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 PM
💨
PM2.5 4.8 µg/m³
55Moderate
2:00 PM
💨
PM2.5 4.8 µg/m³
58Moderate
3:00 PM
💨
PM2.5 4.9 µg/m³
60Moderate
4:00 PM
💨
PM2.5 4.8 µg/m³
63Moderate
5:00 PM
💨
PM2.5 4.9 µg/m³
65Moderate
6:00 PM
💨
PM2.5 4.8 µg/m³
63Moderate
7:00 PM
💨
PM2.5 4.5 µg/m³
56Moderate
8:00 PM
💨
PM2.5 4.4 µg/m³
48Good
9:00 PM
💨
PM2.5 4.5 µg/m³
48Good
10:00 PM
💨
PM2.5 4.5 µg/m³
47Good
11:00 PM
💨
PM2.5 4.6 µg/m³
47Good
12:00 AM
💨
PM2.5 4.6 µg/m³
46Good
Next few days
daily max · US EPA AQI
Fri
💨
Moderate · UV Very high
65
Sat
💨
Moderate · UV Very high
70
Sun
💨
Good · UV Very high
44
Tue
💨
No data · UV High
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