Air quality in Cambridge
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
9.1 µg/m³
WHO guideline 15
PM10
10 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 PM
💨
PM2.5 9.1 µg/m³
81Moderate
5:00 PM
💨
PM2.5 9.2 µg/m³
78Moderate
6:00 PM
💨
PM2.5 8.7 µg/m³
66Moderate
7:00 PM
💨
PM2.5 8.5 µg/m³
51Moderate
8:00 PM
💨
PM2.5 8.1 µg/m³
47Good
9:00 PM
💨
PM2.5 7.3 µg/m³
43Good
10:00 PM
💨
PM2.5 6.1 µg/m³
40Good
11:00 PM
💨
PM2.5 5.2 µg/m³
37Good
12:00 AM
💨
PM2.5 4.9 µg/m³
36Good
1:00 AM
💨
PM2.5 4.8 µg/m³
35Good
2:00 AM
💨
PM2.5 4.8 µg/m³
35Good
3:00 AM
💨
PM2.5 4.7 µg/m³
35Good
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV High
81
Thu
💨
Unhealthy for Sensitive Groups · UV Very high
120
Fri
💨
Unhealthy for Sensitive Groups · UV High
142