Air quality in Chelsea
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
3.4 µg/m³
WHO guideline 15
PM10
3.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 AM
💨
PM2.5 3.4 µg/m³
30Good
11:00 AM
💨
PM2.5 3 µg/m³
35Good
12:00 PM
💨
PM2.5 2.8 µg/m³
38Good
1:00 PM
💨
PM2.5 2.9 µg/m³
39Good
2:00 PM
💨
PM2.5 2.8 µg/m³
40Good
3:00 PM
💨
PM2.5 2.7 µg/m³
42Good
4:00 PM
💨
PM2.5 2.7 µg/m³
43Good
5:00 PM
💨
PM2.5 2.7 µg/m³
42Good
6:00 PM
💨
PM2.5 2.9 µg/m³
38Good
7:00 PM
💨
PM2.5 3.6 µg/m³
33Good
8:00 PM
💨
PM2.5 5.1 µg/m³
28Good
9:00 PM
💨
PM2.5 6.1 µg/m³
25Good
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV High
63
Thu
💨
Moderate · UV High
70
Fri
💨
Unhealthy for Sensitive Groups · UV High
103