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)
54
Moderate
Southbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
45.48 μg/m³
0
55
155
255
425
605+
34.83 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
5.81 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Southbury, Connecticut
Southbury, Connecticut
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AQI 49
Good
9.20μg/m³
PM2.5
33.83μg/m³
PM10
35.22ppb
O3
0.45ppb
SO2
6.60ppb
NO2
0.22ppm
CO
AQI 56
Moderate
11.81μg/m³
PM2.5
26.61μg/m³
PM10
38.89ppb
O3
0.47ppb
SO2
6.99ppb
NO2
0.21ppm
CO
AQI 56
Moderate
11.68μg/m³
PM2.5
22.50μg/m³
PM10
36.53ppb
O3
0.32ppb
SO2
6.46ppb
NO2
0.21ppm
CO
AQI 49
Good
9.33μg/m³
PM2.5
16.80μg/m³
PM10
40.37ppb
O3
0.52ppb
SO2
6.35ppb
NO2
0.21ppm
CO
AQI 32
Good
4.87μg/m³
PM2.5
29.27μg/m³
PM10
35.32ppb
O3
0.44ppb
SO2
7.37ppb
NO2
0.23ppm
CO
AQI 56
Moderate
11.89μg/m³
PM2.5
22.01μg/m³
PM10
34.94ppb
O3
0.31ppb
SO2
5.65ppb
NO2
0.20ppm
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 12:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 05:00:00 on 2026-06-29.
As of now, the AQI in Southbury, Connecticut is 54, 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 10.793 μg/m3.
The PM10 concentration in Southbury, Connecticut is 45.476 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.203 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.466 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 34.833 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 5.81 ppb.
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