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)
52
Moderate
Danbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.12 μg/m³
0
55
155
255
425
605+
14.24 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
18.50 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Danbury, Connecticut
Danbury, Connecticut
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AQI 52
Moderate
10.41μg/m³
PM2.5
17.86μg/m³
PM10
14.23ppb
O3
0.28ppb
SO2
18.98ppb
NO2
0.41ppm
CO
AQI 52
Moderate
10.40μg/m³
PM2.5
22.10μg/m³
PM10
14.48ppb
O3
0.29ppb
SO2
18.98ppb
NO2
0.40ppm
CO
AQI 54
Moderate
10.51μg/m³
PM2.5
19.47μg/m³
PM10
14.37ppb
O3
0.28ppb
SO2
19.33ppb
NO2
0.41ppm
CO
AQI 54
Moderate
11.02μg/m³
PM2.5
35.80μg/m³
PM10
14.27ppb
O3
0.27ppb
SO2
19.47ppb
NO2
0.40ppm
CO
AQI 58
Moderate
12.84μg/m³
PM2.5
37.17μg/m³
PM10
9.57ppb
O3
0.28ppb
SO2
25.66ppb
NO2
0.42ppm
CO
AQI 54
Moderate
11.46μg/m³
PM2.5
45.74μg/m³
PM10
8.60ppb
O3
0.32ppb
SO2
17.82ppb
NO2
0.40ppm
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 03:00:00 on 2025-12-28.
In the last 24 hours, the best air quality in Danbury, Connecticut was observed at 11:00:00 on 2025-12-27.
As of now, the AQI in Danbury, Connecticut is 52, 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 10.211 μg/m3.
The PM10 concentration in Danbury, Connecticut is 16.121 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Danbury, Connecticut is 0.405 ppm.
Currently, Danbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.29 ppb.
The current ozone (O3) level in Danbury, Connecticut at the moment is 14.237 ppm.
Nitrogen dioxide (NO2) level in Danbury, Connecticut at the moment is 18.496 ppb.
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