Air quality in Charlestown
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
13 µg/m³
WHO guideline 15
PM10
13.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 AM
💨
PM2.5 13 µg/m³
53Moderate
7:00 AM
💨
PM2.5 14.5 µg/m³
56Moderate
8:00 AM
💨
PM2.5 15.8 µg/m³
59Moderate
9:00 AM
💨
PM2.5 12.7 µg/m³
52Moderate
10:00 AM
💨
PM2.5 10.2 µg/m³
43Good
11:00 AM
💨
PM2.5 8 µg/m³
48Good
12:00 PM
💨
PM2.5 6.1 µg/m³
48Good
1:00 PM
💨
PM2.5 5 µg/m³
49Good
2:00 PM
💨
PM2.5 3.9 µg/m³
48Good
3:00 PM
💨
PM2.5 3.1 µg/m³
47Good
4:00 PM
💨
PM2.5 2.5 µg/m³
46Good
5:00 PM
💨
PM2.5 2.3 µg/m³
43Good
Next few days
daily max · US EPA AQI
Tue
💨
Moderate · UV High
59
Thu
💨
Moderate · UV High
91