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
12.4 µg/m³
WHO guideline 15
PM10
12.7 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 AM
💨
PM2.5 12.4 µg/m³
52Moderate
8:00 AM
💨
PM2.5 12 µg/m³
50Good
9:00 AM
💨
PM2.5 12.4 µg/m³
52Moderate
10:00 AM
💨
PM2.5 13.7 µg/m³
61Moderate
11:00 AM
💨
PM2.5 15 µg/m³
113Unhealthy for Sensitive Groups
12:00 PM
💨
PM2.5 15.8 µg/m³
150Unhealthy for Sensitive Groups
1:00 PM
💨
PM2.5 16.1 µg/m³
174Unhealthy
2:00 PM
💨
PM2.5 16.6 µg/m³
190Unhealthy
3:00 PM
💨
PM2.5 16.2 µg/m³
195Unhealthy
4:00 PM
💨
PM2.5 15.1 µg/m³
191Unhealthy
5:00 PM
💨
PM2.5 13.3 µg/m³
182Unhealthy
6:00 PM
💨
PM2.5 11.4 µg/m³
165Unhealthy
Next few days
daily max · US EPA AQI
Fri
💨
Unhealthy · UV High
195
Sat
💨
Moderate · UV High
65