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
5.9 µg/m³
WHO guideline 15
PM10
6.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 PM
💨
PM2.5 5.9 µg/m³
48Good
3:00 PM
💨
PM2.5 6.2 µg/m³
50Good
4:00 PM
💨
PM2.5 6.9 µg/m³
56Moderate
5:00 PM
💨
PM2.5 7.4 µg/m³
56Moderate
6:00 PM
💨
PM2.5 7.5 µg/m³
49Good
7:00 PM
💨
PM2.5 8.1 µg/m³
44Good
8:00 PM
💨
PM2.5 9.7 µg/m³
40Good
9:00 PM
💨
PM2.5 10.9 µg/m³
45Good
10:00 PM
💨
PM2.5 11.2 µg/m³
47Good
11:00 PM
💨
PM2.5 11.1 µg/m³
46Good
12:00 AM
💨
PM2.5 11 µg/m³
46Good
1:00 AM
💨
PM2.5 11 µg/m³
46Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV High
56
Sun
💨
Unhealthy for Sensitive Groups · UV High
101
Mon
💨
Unhealthy for Sensitive Groups · UV High
135
Tue
💨
Unhealthy for Sensitive Groups · UV Low
103
Wed
💨
Moderate · UV High
66