Air quality in Hopkinton
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
3.9 µg/m³
WHO guideline 15
PM10
4.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 PM
💨
PM2.5 3.9 µg/m³
60Moderate
2:00 PM
💨
PM2.5 4.3 µg/m³
70Moderate
3:00 PM
💨
PM2.5 4.5 µg/m³
73Moderate
4:00 PM
💨
PM2.5 4.8 µg/m³
73Moderate
5:00 PM
💨
PM2.5 4.9 µg/m³
70Moderate
6:00 PM
💨
PM2.5 5.7 µg/m³
65Moderate
7:00 PM
💨
PM2.5 6.2 µg/m³
56Moderate
8:00 PM
💨
PM2.5 6.5 µg/m³
51Moderate
9:00 PM
💨
PM2.5 7.1 µg/m³
50Good
10:00 PM
💨
PM2.5 7.8 µg/m³
50Good
11:00 PM
💨
PM2.5 8.8 µg/m³
50Good
12:00 AM
💨
PM2.5 10 µg/m³
51Moderate
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV High
73
Thu
💨
Moderate · UV High
70
Fri
💨
Moderate · UV High
53
Sat
💨
Good · UV Moderate
47