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)
66
Moderate
Danbury, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
17.10 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.14 μg/m³
0
55
155
255
425
605+
48.92 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
7.46 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Danbury, Connecticut
Danbury, Connecticut
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AQI 66
Moderate
17.04μg/m³
PM2.5
28.86μg/m³
PM10
52.08ppb
O3
0.46ppb
SO2
7.43ppb
NO2
0.32ppm
CO
AQI 64
Moderate
16.44μg/m³
PM2.5
34.10μg/m³
PM10
50.08ppb
O3
0.48ppb
SO2
7.07ppb
NO2
0.33ppm
CO
AQI 66
Moderate
16.95μg/m³
PM2.5
30.18μg/m³
PM10
50.60ppb
O3
0.46ppb
SO2
7.55ppb
NO2
0.33ppm
CO
AQI 64
Moderate
16.30μg/m³
PM2.5
27.81μg/m³
PM10
43.25ppb
O3
0.41ppb
SO2
14.29ppb
NO2
0.30ppm
CO
AQI 64
Moderate
16.38μg/m³
PM2.5
29.55μg/m³
PM10
32.03ppb
O3
0.43ppb
SO2
19.16ppb
NO2
0.34ppm
CO
AQI 60
Moderate
13.99μg/m³
PM2.5
57.95μg/m³
PM10
44.09ppb
O3
0.53ppb
SO2
8.34ppb
NO2
0.37ppm
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 11:00:00 on 2025-06-05.
In the last 24 hours, the best air quality in Danbury, Connecticut was observed at 02:00:00 on 2025-06-06.
As of now, the AQI in Danbury, Connecticut is 66, indicating Moderate 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 17.097 μg/m3.
The PM10 concentration in Danbury, Connecticut is 27.143 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Danbury, Connecticut is 0.358 ppm.
Currently, Danbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.447 ppb.
The current ozone (O3) level in Danbury, Connecticut at the moment is 48.918 ppm.
Nitrogen dioxide (NO2) level in Danbury, Connecticut at the moment is 7.463 ppb.
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