Stay updated with real-time air quality in Seymour, Connecticut 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)
40
Good
Seymour, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.87 μg/m³
0
55
155
255
425
605+
43.26 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
5.36 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Seymour, Connecticut
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AQI 40
Good
5.57μg/m³
PM2.5
15.86μg/m³
PM10
42.64ppb
O3
0.36ppb
SO2
5.26ppb
NO2
0.17ppm
CO
AQI 39
Good
5.67μg/m³
PM2.5
15.89μg/m³
PM10
42.47ppb
O3
0.34ppb
SO2
5.29ppb
NO2
0.18ppm
CO
AQI 40
Good
5.57μg/m³
PM2.5
15.86μg/m³
PM10
42.64ppb
O3
0.36ppb
SO2
5.26ppb
NO2
0.17ppm
CO
AQI 40
Good
5.57μg/m³
PM2.5
15.86μg/m³
PM10
42.64ppb
O3
0.36ppb
SO2
5.26ppb
NO2
0.17ppm
CO
AQI 42
Good
6.04μg/m³
PM2.5
15.72μg/m³
PM10
44.77ppb
O3
0.32ppb
SO2
5.48ppb
NO2
0.18ppm
CO
AQI 40
Good
5.55μg/m³
PM2.5
16.96μg/m³
PM10
43.05ppb
O3
0.38ppb
SO2
4.86ppb
NO2
0.20ppm
CO
Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Seymour, Connecticut is updated on an hourly basis.
The worst air quality in Seymour, Connecticut was recorded at 01:00:00 on 2026-03-29.
The best air quality in Seymour, Connecticut was recorded at 03:00:00 on 2026-03-29.
The real-time air quality index in Seymour, Connecticut is 40, currently categorized as Good.
The most common pollutant in Seymour, Connecticut is O3.
If the air quality in Seymour, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Seymour, Connecticut at present are 5.64 μg/m3.
The current PM10 levels in Seymour, Connecticut are 15.873 μg/m3.
The current carbon monoxide (CO) level in Seymour, Connecticut is 0.171 ppm.
The current sulfur dioxide (SO2) levels in Seymour, Connecticut are 0.357 ppb.
The current ozone (O3) levels at Seymour, Connecticut is 43.256 ppm.
The current nitrogen dioxide (NO2) levels at Seymour, Connecticut is 5.359 ppb.
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