Stay updated with real-time air quality in Smithtown, New York featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
26
Good
Smithtown, New York
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.37 μg/m³
0
55
155
255
425
605+
27.78 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
4.12 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Smithtown, New York
Smithtown, New York
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AQI 32
Good
5.46μg/m³
PM2.5
21.53μg/m³
PM10
34.96ppb
O3
0.65ppb
SO2
4.33ppb
NO2
0.26ppm
CO
AQI 27
Good
5.35μg/m³
PM2.5
20.52μg/m³
PM10
24.64ppb
O3
0.68ppb
SO2
5.35ppb
NO2
0.29ppm
CO
AQI 33
Good
5.31μg/m³
PM2.5
21.83μg/m³
PM10
35.62ppb
O3
0.65ppb
SO2
5.09ppb
NO2
0.27ppm
CO
AQI 33
Good
5.69μg/m³
PM2.5
17.63μg/m³
PM10
29.55ppb
O3
0.71ppb
SO2
8.39ppb
NO2
0.28ppm
CO
AQI 31
Good
5.25μg/m³
PM2.5
18.00μg/m³
PM10
32.63ppb
O3
0.63ppb
SO2
9.66ppb
NO2
0.28ppm
CO
AQI 30
Good
5.21μg/m³
PM2.5
17.81μg/m³
PM10
32.27ppb
O3
0.62ppb
SO2
10.40ppb
NO2
0.28ppm
CO
Air quality data and pollutant measurements for New York, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Smithtown, New York is updated every hour.
The worst air quality in Smithtown, New York in the last 24 hours was observed at 09:00:00 on 2026-08-17.
In the last 24 hrs, the best air quality in Smithtown, New York was observed at 03:00:00 on 2026-08-17.
The current air quality in Smithtown, New York is 26, categorized as Good based on real-time data.
The most common pollutant in Smithtown, New York is O3.
If the air quality in Smithtown, New York is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Smithtown, New York is 3.98 μg/m3.
The current PM10 concentration at Smithtown, New York is 17.373 μg/m3.
The current carbon monoxide (CO) concentration at Smithtown, New York is 0.255 ppm.
The current sulfur dioxide (SO2) concentration at Smithtown, New York is 0.311 ppb.
The current ozone (O3) concentration at Smithtown, New York is 27.783 ppm.
The current nitrogen dioxide (NO2) concentration at Smithtown, New York is 4.121 ppb.
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