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)
47
Good
Danbury, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
8.49 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.03 μg/m³
0
55
155
255
425
605+
50.95 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
3.70 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Danbury, Connecticut
Danbury, Connecticut
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AQI 49
Good
8.69μg/m³
PM2.5
17.64μg/m³
PM10
53.26ppb
O3
0.24ppb
SO2
3.68ppb
NO2
0.24ppm
CO
AQI 49
Good
8.52μg/m³
PM2.5
20.26μg/m³
PM10
51.05ppb
O3
0.24ppb
SO2
3.62ppb
NO2
0.23ppm
CO
AQI 49
Good
8.56μg/m³
PM2.5
18.07μg/m³
PM10
52.36ppb
O3
0.24ppb
SO2
3.67ppb
NO2
0.24ppm
CO
AQI 54
Moderate
8.42μg/m³
PM2.5
30.37μg/m³
PM10
56.07ppb
O3
0.22ppb
SO2
3.12ppb
NO2
0.23ppm
CO
AQI 39
Good
7.00μg/m³
PM2.5
21.44μg/m³
PM10
42.10ppb
O3
0.25ppb
SO2
3.20ppb
NO2
0.24ppm
CO
AQI 44
Good
7.61μg/m³
PM2.5
31.52μg/m³
PM10
42.80ppb
O3
0.25ppb
SO2
3.15ppb
NO2
0.22ppm
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 12:00:00 on 2025-09-13.
In the last 24 hours, the best air quality in Danbury, Connecticut was observed at 12:00:00 on 2025-09-13.
As of now, the AQI in Danbury, Connecticut is 47, indicating Good conditions.
Danbury, Connecticut air has the highest levels of O3.
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 8.49 μg/m3.
The PM10 concentration in Danbury, Connecticut is 16.026 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Danbury, Connecticut is 0.237 ppm.
Currently, Danbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.249 ppb.
The current ozone (O3) level in Danbury, Connecticut at the moment is 50.945 ppm.
Nitrogen dioxide (NO2) level in Danbury, Connecticut at the moment is 3.703 ppb.
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