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)
38
Good
Danbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.09 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.01 μg/m³
0
55
155
255
425
605+
36.95 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
11.55 ppb
0
54
101
361
1250
2050+
0.21 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
6.11μg/m³
PM2.5
12.34μg/m³
PM10
33.30ppb
O3
0.49ppb
SO2
11.58ppb
NO2
0.20ppm
CO
AQI 33
Good
5.62μg/m³
PM2.5
12.15μg/m³
PM10
31.60ppb
O3
0.50ppb
SO2
11.68ppb
NO2
0.20ppm
CO
AQI 33
Good
6.03μg/m³
PM2.5
12.51μg/m³
PM10
32.83ppb
O3
0.49ppb
SO2
11.59ppb
NO2
0.20ppm
CO
AQI 28
Good
4.48μg/m³
PM2.5
12.63μg/m³
PM10
29.77ppb
O3
0.43ppb
SO2
8.33ppb
NO2
0.20ppm
CO
AQI 30
Good
3.92μg/m³
PM2.5
8.17μg/m³
PM10
31.64ppb
O3
0.61ppb
SO2
11.85ppb
NO2
0.21ppm
CO
AQI 22
Good
3.83μg/m³
PM2.5
12.49μg/m³
PM10
22.55ppb
O3
0.61ppb
SO2
12.27ppb
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 10:00:00 on 2026-05-13.
In the last 24 hours, the best air quality in Danbury, Connecticut was observed at 01:00:00 on 2026-05-13.
As of now, the AQI in Danbury, Connecticut is 38, 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 7.092 μg/m3.
The PM10 concentration in Danbury, Connecticut is 13.007 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Danbury, Connecticut is 0.215 ppm.
Currently, Danbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.466 ppb.
The current ozone (O3) level in Danbury, Connecticut at the moment is 36.954 ppm.
Nitrogen dioxide (NO2) level in Danbury, Connecticut at the moment is 11.551 ppb.
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