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)
27
Good
Southbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.84 μg/m³
0
55
155
255
425
605+
28.84 ppb
0
55
71
86
201
201+
0.38 ppb
0
36
76
186
605
1005+
11.99 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Southbury, Connecticut
Southbury, Connecticut
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AQI 33
Good
6.03μg/m³
PM2.5
14.65μg/m³
PM10
30.77ppb
O3
0.37ppb
SO2
12.26ppb
NO2
0.21ppm
CO
AQI 27
Good
5.15μg/m³
PM2.5
14.62μg/m³
PM10
24.90ppb
O3
0.40ppb
SO2
8.47ppb
NO2
0.21ppm
CO
AQI 33
Good
5.65μg/m³
PM2.5
13.40μg/m³
PM10
32.04ppb
O3
0.35ppb
SO2
12.74ppb
NO2
0.21ppm
CO
AQI 38
Good
6.83μg/m³
PM2.5
13.23μg/m³
PM10
35.68ppb
O3
0.47ppb
SO2
11.42ppb
NO2
0.22ppm
CO
AQI 33
Good
6.13μg/m³
PM2.5
14.72μg/m³
PM10
30.99ppb
O3
0.37ppb
SO2
12.06ppb
NO2
0.21ppm
CO
AQI 33
Good
5.50μg/m³
PM2.5
13.00μg/m³
PM10
30.86ppb
O3
0.34ppb
SO2
13.08ppb
NO2
0.21ppm
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 10:00:00 on 2026-05-13.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 12:00:00 on 2026-05-14.
As of now, the AQI in Southbury, Connecticut is 27, indicating Good conditions.
Southbury, Connecticut air has the highest levels of O3.
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 5.403 μg/m3.
The PM10 concentration in Southbury, Connecticut is 11.843 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.233 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.376 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 28.838 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 11.987 ppb.
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