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)
33
Good
Southbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.24 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.11 μg/m³
0
55
155
255
425
605+
29.97 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
6.31 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Southbury, Connecticut
Southbury, Connecticut
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AQI 38
Good
6.50μg/m³
PM2.5
35.79μg/m³
PM10
3.79ppb
O3
0.73ppb
SO2
18.56ppb
NO2
0.34ppm
CO
AQI 44
Good
7.82μg/m³
PM2.5
26.39μg/m³
PM10
3.95ppb
O3
0.79ppb
SO2
19.47ppb
NO2
0.36ppm
CO
AQI 52
Moderate
9.91μg/m³
PM2.5
16.50μg/m³
PM10
4.65ppb
O3
0.67ppb
SO2
20.75ppb
NO2
0.33ppm
CO
AQI 58
Moderate
13.48μg/m³
PM2.5
25.15μg/m³
PM10
4.49ppb
O3
1.01ppb
SO2
18.03ppb
NO2
0.38ppm
CO
AQI 38
Good
7.38μg/m³
PM2.5
33.84μg/m³
PM10
3.41ppb
O3
0.67ppb
SO2
15.50ppb
NO2
0.32ppm
CO
AQI 52
Moderate
9.51μg/m³
PM2.5
16.01μg/m³
PM10
3.90ppb
O3
0.69ppb
SO2
20.76ppb
NO2
0.34ppm
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 09:00:00 on 2025-11-03.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 05:00:00 on 2025-11-02.
As of now, the AQI in Southbury, Connecticut is 52, 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 9.663 μg/m3.
The PM10 concentration in Southbury, Connecticut is 52.228 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.347 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.765 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 4.187 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 21.806 ppb.
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