Air quality in Dorchester
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
4.4 µg/m³
WHO guideline 15
PM10
5.6 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
4:00 AM
💨
PM2.5 4.4 µg/m³
35 Good
5:00 AM
💨
PM2.5 4.3 µg/m³
34 Good
6:00 AM
💨
PM2.5 4.4 µg/m³
33 Good
7:00 AM
💨
PM2.5 5.1 µg/m³
29 Good
8:00 AM
💨
PM2.5 6.3 µg/m³
28 Good
9:00 AM
💨
PM2.5 7 µg/m³
29 Good
10:00 AM
💨
PM2.5 6.9 µg/m³
32 Good
11:00 AM
💨
PM2.5 6.6 µg/m³
35 Good
12:00 PM
💨
PM2.5 6.6 µg/m³
38 Good
1:00 PM
💨
PM2.5 6.3 µg/m³
41 Good
2:00 PM
💨
PM2.5 6.7 µg/m³
43 Good
3:00 PM
💨
PM2.5 7.3 µg/m³
43 Good
Next few days daily max · US EPA AQI
Mon
💨
Moderate · UV Moderate
85
Tue
💨
Moderate · UV Low
58
Wed
💨
Moderate · UV Moderate
52
Thu
💨
Good · UV Moderate
42
Fri
💨
Moderate · UV Moderate
71
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain