Stay updated with real-time air quality in Danbury, 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
Danbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.29 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.01 μg/m³
0
55
155
255
425
605+
12.01 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
9.02 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Danbury, Connecticut
Danbury, Connecticut
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AQI 33
Good
6.23μg/m³
PM2.5
17.04μg/m³
PM10
12.26ppb
O3
0.19ppb
SO2
9.00ppb
NO2
0.17ppm
CO
AQI 33
Good
5.87μg/m³
PM2.5
17.62μg/m³
PM10
12.25ppb
O3
0.20ppb
SO2
8.92ppb
NO2
0.17ppm
CO
AQI 33
Good
6.19μg/m³
PM2.5
17.28μg/m³
PM10
12.28ppb
O3
0.19ppb
SO2
9.05ppb
NO2
0.17ppm
CO
AQI 38
Good
6.57μg/m³
PM2.5
19.82μg/m³
PM10
14.13ppb
O3
0.19ppb
SO2
8.82ppb
NO2
0.17ppm
CO
AQI 38
Good
6.85μg/m³
PM2.5
20.33μg/m³
PM10
17.72ppb
O3
0.19ppb
SO2
8.55ppb
NO2
0.20ppm
CO
AQI 27
Good
4.80μg/m³
PM2.5
21.96μg/m³
PM10
11.00ppb
O3
0.19ppb
SO2
8.56ppb
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 Danbury, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Danbury, Connecticut was at its worst at 10:00:00 on 2026-08-09.
In the last 24 hours, the best air quality in Danbury, Connecticut was observed at 10:00:00 on 2026-08-10.
As of now, the AQI in Danbury, Connecticut is 33, indicating Good conditions.
Danbury, Connecticut air has the highest levels of PM2.5.
Poor air quality in Danbury, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Danbury, Connecticut are currently 6.293 μg/m3.
The PM10 concentration in Danbury, Connecticut is 17.011 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Danbury, Connecticut is 0.168 ppm.
Currently, Danbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.187 ppb.
The current ozone (O3) level in Danbury, Connecticut at the moment is 12.012 ppm.
Nitrogen dioxide (NO2) level in Danbury, Connecticut at the moment is 9.022 ppb.
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