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)
27
Good
Smithtown, New York
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.47 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.88 μg/m³
0
55
155
255
425
605+
29.24 ppb
0
55
71
86
201
201+
1.05 ppb
0
36
76
186
605
1005+
17.43 ppb
0
54
101
361
1250
2050+
0.33 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 27
Good
5.35μg/m³
PM2.5
24.66μg/m³
PM10
29.45ppb
O3
1.05ppb
SO2
15.27ppb
NO2
0.34ppm
CO
AQI 33
Good
5.64μg/m³
PM2.5
23.99μg/m³
PM10
29.84ppb
O3
1.00ppb
SO2
14.76ppb
NO2
0.35ppm
CO
AQI 28
Good
5.16μg/m³
PM2.5
23.05μg/m³
PM10
29.78ppb
O3
1.02ppb
SO2
15.67ppb
NO2
0.34ppm
CO
AQI 52
Moderate
9.78μg/m³
PM2.5
43.29μg/m³
PM10
19.50ppb
O3
1.26ppb
SO2
18.36ppb
NO2
0.35ppm
CO
AQI 49
Good
9.25μg/m³
PM2.5
41.06μg/m³
PM10
27.81ppb
O3
1.20ppb
SO2
17.76ppb
NO2
0.36ppm
CO
AQI 52
Moderate
9.66μg/m³
PM2.5
43.13μg/m³
PM10
27.85ppb
O3
1.20ppb
SO2
18.11ppb
NO2
0.36ppm
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 04:00:00 on 2026-11-03.
In the last 24 hrs, the best air quality in Smithtown, New York was observed at 09:00:00 on 2026-11-03.
The current air quality in Smithtown, New York is 27, 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 5.469 μg/m3.
The current PM10 concentration at Smithtown, New York is 18.881 μg/m3.
The current carbon monoxide (CO) concentration at Smithtown, New York is 0.327 ppm.
The current sulfur dioxide (SO2) concentration at Smithtown, New York is 1.049 ppb.
The current ozone (O3) concentration at Smithtown, New York is 29.238 ppm.
The current nitrogen dioxide (NO2) concentration at Smithtown, New York is 17.433 ppb.
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