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
9.4 µg/m³
WHO guideline 15
PM10
15.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
8:00 AM
💨
PM2.5 9.4 µg/m³
41Good
9:00 AM
💨
PM2.5 9.6 µg/m³
43Good
10:00 AM
💨
PM2.5 8.4 µg/m³
45Good
11:00 AM
💨
PM2.5 6.6 µg/m³
47Good
12:00 PM
💨
PM2.5 5.6 µg/m³
48Good
1:00 PM
💨
PM2.5 6.1 µg/m³
58Moderate
2:00 PM
💨
PM2.5 7.2 µg/m³
68Moderate
3:00 PM
💨
PM2.5 8.8 µg/m³
78Moderate
4:00 PM
💨
PM2.5 10.8 µg/m³
86Moderate
5:00 PM
💨
PM2.5 12.6 µg/m³
95Moderate
6:00 PM
💨
PM2.5 13.6 µg/m³
101Unhealthy for Sensitive Groups
7:00 PM
💨
PM2.5 14.1 µg/m³
108Unhealthy for Sensitive Groups
Next few days
daily max · US EPA AQI
Thu
💨
Unhealthy for Sensitive Groups · UV High
110
Fri
💨
Unhealthy for Sensitive Groups · UV High
104
Sun
💨
Good · UV Moderate
44