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)
62
Moderate
Smithtown, New York
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
14.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
64.21 μg/m³
0
55
155
255
425
605+
10.96 ppb
0
55
71
86
201
201+
0.80 ppb
0
36
76
186
605
1005+
14.06 ppb
0
54
101
361
1250
2050+
0.47 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 66
Moderate
17.03μg/m³
PM2.5
72.33μg/m³
PM10
10.05ppb
O3
0.71ppb
SO2
11.80ppb
NO2
0.46ppm
CO
AQI 60
Moderate
13.91μg/m³
PM2.5
57.60μg/m³
PM10
6.57ppb
O3
0.80ppb
SO2
13.90ppb
NO2
0.47ppm
CO
AQI 67
Moderate
17.73μg/m³
PM2.5
76.06μg/m³
PM10
9.07ppb
O3
0.71ppb
SO2
12.69ppb
NO2
0.47ppm
CO
AQI 60
Moderate
13.81μg/m³
PM2.5
57.58μg/m³
PM10
7.56ppb
O3
0.80ppb
SO2
10.14ppb
NO2
0.47ppm
CO
AQI 62
Moderate
15.32μg/m³
PM2.5
69.95μg/m³
PM10
8.23ppb
O3
0.80ppb
SO2
17.34ppb
NO2
0.48ppm
CO
AQI 62
Moderate
15.26μg/m³
PM2.5
72.01μg/m³
PM10
7.42ppb
O3
0.81ppb
SO2
18.18ppb
NO2
0.48ppm
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 06:00:00 on 2025-12-07.
In the last 24 hrs, the best air quality in Smithtown, New York was observed at 09:00:00 on 2025-12-06.
The current air quality in Smithtown, New York is 62, categorized as Moderate based on real-time data.
The most common pollutant in Smithtown, New York is PM2.5.
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 14.6 μg/m3.
The current PM10 concentration at Smithtown, New York is 64.206 μg/m3.
The current carbon monoxide (CO) concentration at Smithtown, New York is 0.465 ppm.
The current sulfur dioxide (SO2) concentration at Smithtown, New York is 0.796 ppb.
The current ozone (O3) concentration at Smithtown, New York is 10.964 ppm.
The current nitrogen dioxide (NO2) concentration at Smithtown, New York is 14.062 ppb.
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