Air quality in Leominster
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
4.8 µg/m³
WHO guideline 15
PM10
4.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 PM
💨
PM2.5 4.8 µg/m³
32Good
8:00 PM
💨
PM2.5 5.4 µg/m³
28Good
9:00 PM
💨
PM2.5 5.5 µg/m³
26Good
10:00 PM
💨
PM2.5 5.4 µg/m³
25Good
11:00 PM
💨
PM2.5 5.2 µg/m³
25Good
12:00 AM
💨
PM2.5 4.7 µg/m³
25Good
1:00 AM
💨
PM2.5 4 µg/m³
26Good
2:00 AM
💨
PM2.5 3.3 µg/m³
27Good
3:00 AM
💨
PM2.5 2.6 µg/m³
27Good
4:00 AM
💨
PM2.5 2.1 µg/m³
28Good
5:00 AM
💨
PM2.5 1.7 µg/m³
28Good
6:00 AM
💨
PM2.5 1.6 µg/m³
28Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV Moderate
51
Mon
💨
Moderate · UV High
61
Tue
💨
Moderate · UV High
58