Air quality in Smithtown
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
16.3 µg/m³
WHO guideline 15
PM10
16.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 AM
💨
PM2.5 16.3 µg/m³
60Moderate
7:00 AM
💨
PM2.5 13.9 µg/m³
55Moderate
8:00 AM
💨
PM2.5 12.4 µg/m³
52Moderate
9:00 AM
💨
PM2.5 11 µg/m³
46Good
10:00 AM
💨
PM2.5 9.2 µg/m³
39Good
11:00 AM
💨
PM2.5 9.6 µg/m³
50Good
12:00 PM
💨
PM2.5 13.4 µg/m³
76Moderate
1:00 PM
💨
PM2.5 17.7 µg/m³
101Unhealthy for Sensitive Groups
2:00 PM
💨
PM2.5 23.1 µg/m³
129Unhealthy for Sensitive Groups
3:00 PM
💨
PM2.5 26.5 µg/m³
159Unhealthy
4:00 PM
💨
PM2.5 27.6 µg/m³
184Unhealthy
5:00 PM
💨
PM2.5 25.3 µg/m³
200Unhealthy
Next few days
daily max · US EPA AQI
Wed
💨
Unhealthy · UV Very high
200
Thu
💨
Moderate · UV Moderate
100
Fri
💨
Moderate · UV High
91
Sat
💨
Moderate · UV Moderate
55
Sun
💨
Good · UV Moderate
40