Stay updated with real-time air quality in Southbury, 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)
60
Moderate
Southbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
14.36 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
67.95 μg/m³
0
55
155
255
425
605+
14.83 ppb
0
55
71
86
201
201+
0.53 ppb
0
36
76
186
605
1005+
24.15 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Southbury, Connecticut
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AQI 56
Moderate
12.38μg/m³
PM2.5
33.49μg/m³
PM10
15.45ppb
O3
0.51ppb
SO2
24.23ppb
NO2
0.29ppm
CO
AQI 64
Moderate
15.52μg/m³
PM2.5
63.86μg/m³
PM10
12.90ppb
O3
0.53ppb
SO2
27.83ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.86μg/m³
PM2.5
22.70μg/m³
PM10
23.64ppb
O3
0.50ppb
SO2
23.35ppb
NO2
0.28ppm
CO
AQI 60
Moderate
14.19μg/m³
PM2.5
24.67μg/m³
PM10
11.52ppb
O3
0.56ppb
SO2
30.64ppb
NO2
0.31ppm
CO
AQI 54
Moderate
11.30μg/m³
PM2.5
34.52μg/m³
PM10
16.69ppb
O3
2.37ppb
SO2
23.24ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.80μg/m³
PM2.5
22.99μg/m³
PM10
24.63ppb
O3
0.51ppb
SO2
22.48ppb
NO2
0.28ppm
CO
Air quality and pollutant data for Connecticut, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Southbury, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Southbury, Connecticut was at its worst at 05:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 06:00:00 on 2026-02-10.
As of now, the AQI in Southbury, Connecticut is 60, indicating Moderate conditions.
Southbury, Connecticut air has the highest levels of PM2.5.
Poor air quality in Southbury, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Southbury, Connecticut are currently 14.357 μg/m3.
The PM10 concentration in Southbury, Connecticut is 67.946 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.284 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.53 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 14.828 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 24.151 ppb.
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