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
6.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.62 μg/m³
0
55
155
255
425
605+
19.26 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
4.47 ppb
0
54
101
361
1250
2050+
0.19 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
7.40μg/m³
PM2.5
38.02μg/m³
PM10
17.63ppb
O3
0.41ppb
SO2
5.74ppb
NO2
0.19ppm
CO
AQI 38
Good
7.26μg/m³
PM2.5
26.70μg/m³
PM10
16.90ppb
O3
0.44ppb
SO2
6.41ppb
NO2
0.20ppm
CO
AQI 44
Good
7.94μg/m³
PM2.5
14.65μg/m³
PM10
20.38ppb
O3
0.40ppb
SO2
5.00ppb
NO2
0.18ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
16.07μg/m³
PM10
17.09ppb
O3
0.48ppb
SO2
7.34ppb
NO2
0.20ppm
CO
AQI 44
Good
7.58μg/m³
PM2.5
27.42μg/m³
PM10
18.84ppb
O3
0.41ppb
SO2
6.26ppb
NO2
0.19ppm
CO
AQI 44
Good
8.10μg/m³
PM2.5
14.02μg/m³
PM10
20.54ppb
O3
0.39ppb
SO2
4.66ppb
NO2
0.18ppm
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 2026-07-11.
In the last 24 hours, the best air quality in Southbury, Connecticut was observed at 01:00:00 on 2026-07-11.
As of now, the AQI in Southbury, Connecticut is 33, indicating Good 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 6.206 μg/m3.
The PM10 concentration in Southbury, Connecticut is 22.619 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Southbury, Connecticut is 0.191 ppm.
Currently, Southbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.419 ppb.
The current ozone (O3) level in Southbury, Connecticut at the moment is 19.259 ppm.
Nitrogen dioxide (NO2) level in Southbury, Connecticut at the moment is 4.474 ppb.
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