Air quality in Cohasset
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
3.8 µg/m³
WHO guideline 15
PM10
3.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 PM
💨
PM2.5 3.8 µg/m³
28Good
6:00 PM
💨
PM2.5 3.6 µg/m³
27Good
7:00 PM
💨
PM2.5 3.6 µg/m³
26Good
8:00 PM
💨
PM2.5 3.6 µg/m³
25Good
9:00 PM
💨
PM2.5 3.5 µg/m³
23Good
10:00 PM
💨
PM2.5 3.4 µg/m³
22Good
11:00 PM
💨
PM2.5 3.2 µg/m³
21Good
12:00 AM
💨
PM2.5 3 µg/m³
21Good
1:00 AM
💨
PM2.5 2.8 µg/m³
21Good
2:00 AM
💨
PM2.5 2.7 µg/m³
20Good
3:00 AM
💨
PM2.5 2.5 µg/m³
20Good
4:00 AM
💨
PM2.5 2.3 µg/m³
19Good
Next few days
daily max · US EPA AQI