Air quality in Boston
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
6.8 µg/m³
WHO guideline 15
PM10
6.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 PM
💨
PM2.5 6.8 µg/m³
50Good
1:00 PM
💨
PM2.5 7.4 µg/m³
47Good
2:00 PM
💨
PM2.5 8.8 µg/m³
46Good
3:00 PM
💨
PM2.5 9.4 µg/m³
48Good
4:00 PM
💨
PM2.5 10 µg/m³
50Good
5:00 PM
💨
PM2.5 10.8 µg/m³
55Moderate
6:00 PM
💨
PM2.5 11.6 µg/m³
51Moderate
7:00 PM
💨
PM2.5 12.5 µg/m³
52Moderate
8:00 PM
💨
PM2.5 13.2 µg/m³
53Moderate
9:00 PM
💨
PM2.5 13.8 µg/m³
55Moderate
10:00 PM
💨
PM2.5 14 µg/m³
55Moderate
11:00 PM
💨
PM2.5 13.7 µg/m³
54Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV High
55
Tue
💨
Moderate · UV High
54
Wed
💨
Moderate · UV High
55
Thu
💨
Unhealthy for Sensitive Groups · UV High
111