Air quality in Westford
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
5.1 µg/m³
WHO guideline 15
PM10
5.2 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 PM
💨
PM2.5 5.1 µg/m³
43Good
1:00 PM
💨
PM2.5 6.7 µg/m³
42Good
2:00 PM
💨
PM2.5 8.2 µg/m³
42Good
3:00 PM
💨
PM2.5 8.9 µg/m³
45Good
4:00 PM
💨
PM2.5 9.6 µg/m³
50Good
5:00 PM
💨
PM2.5 10.6 µg/m³
55Moderate
6:00 PM
💨
PM2.5 11.4 µg/m³
53Moderate
7:00 PM
💨
PM2.5 12 µg/m³
50Good
8:00 PM
💨
PM2.5 12.5 µg/m³
52Moderate
9:00 PM
💨
PM2.5 12.8 µg/m³
52Moderate
10:00 PM
💨
PM2.5 12.9 µg/m³
53Moderate
11:00 PM
💨
PM2.5 13.3 µg/m³
54Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV High
55
Tue
💨
Moderate · UV High
55
Thu
💨
Unhealthy for Sensitive Groups · UV High
106