Air quality in Marlborough
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
6.6 µg/m³
WHO guideline 15
PM10
8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 6.6 µg/m³
28Good
5:00 AM
💨
PM2.5 5.2 µg/m³
22Good
6:00 AM
💨
PM2.5 4.3 µg/m³
18Good
7:00 AM
💨
PM2.5 3.8 µg/m³
17Good
8:00 AM
💨
PM2.5 3.8 µg/m³
18Good
9:00 AM
💨
PM2.5 3.9 µg/m³
20Good
10:00 AM
💨
PM2.5 3.8 µg/m³
22Good
11:00 AM
💨
PM2.5 3.7 µg/m³
24Good
12:00 PM
💨
PM2.5 3 µg/m³
27Good
1:00 PM
💨
PM2.5 2.4 µg/m³
30Good
2:00 PM
💨
PM2.5 2.6 µg/m³
32Good
3:00 PM
💨
PM2.5 3.1 µg/m³
32Good
Next few days
daily max · US EPA AQI
Wed
💨
Good · UV Moderate
50
Thu
💨
Moderate · UV Low
64
Fri
💨
Moderate · UV Moderate
74
Sat
💨
Moderate · UV Moderate
93
Sun
💨
Unhealthy for Sensitive Groups · UV High
102