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)
56
Moderate
Southbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.19 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.66 μg/m³
0
55
155
255
425
605+
39.64 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
5.89 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Southbury, Connecticut
Southbury, Connecticut
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AQI 54
Moderate
11.39μg/m³
PM2.5
25.55μg/m³
PM10
37.71ppb
O3
0.40ppb
SO2
6.52ppb
NO2
0.19ppm
CO
AQI 56
Moderate
11.96μg/m³
PM2.5
39.23μg/m³
PM10
47.35ppb
O3
0.43ppb
SO2
6.57ppb
NO2
0.19ppm
CO
AQI 56
Moderate
12.36μg/m³
PM2.5
29.49μg/m³
PM10
37.11ppb
O3
0.27ppb
SO2
6.38ppb
NO2
0.18ppm
CO
AQI 52
Moderate
9.90μg/m³
PM2.5
17.11μg/m³
PM10
45.15ppb
O3
0.48ppb
SO2
5.92ppb
NO2
0.20ppm
CO
AQI 49
Good
9.31μg/m³
PM2.5
23.40μg/m³
PM10
37.93ppb
O3
0.39ppb
SO2
7.20ppb
NO2
0.19ppm
CO
AQI 56
Moderate
12.40μg/m³
PM2.5
29.98μg/m³
PM10
35.20ppb
O3
0.25ppb
SO2
5.79ppb
NO2
0.17ppm
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 03:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 09:00:00 on 2026-06-29.
As of now, the AQI in Southbury, Connecticut is 56, 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 12.189 μg/m3.
The PM10 concentration in Southbury, Connecticut is 27.663 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.182 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.424 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 39.644 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 5.891 ppb.
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