Real-time air quality index in Darien, Connecticut today
Stay updated with real-time air quality in Darien, 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
Darien, Connecticut
Last updated: ... (Local time)
Common air pollutants in Darien, Connecticut
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
5.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
23.19 μg/m³
0
55
155
255
425
605+
Ozone (O3)
33.92 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.34 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
10.69 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Darien, Connecticut
Darien, Connecticut
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Darien, Connecticut air quality map: Real-time AQI near you
Air quality in nearby cities
Stamford, Connecticut
AQI 29
Good
3.94μg/m³
PM2.5
25.01μg/m³
PM10
30.62ppb
O3
0.45ppb
SO2
14.87ppb
NO2
0.28ppm
CO
Norwalk, Connecticut
AQI 33
Good
5.67μg/m³
PM2.5
15.87μg/m³
PM10
29.08ppb
O3
0.41ppb
SO2
6.85ppb
NO2
0.28ppm
CO
New Canaan, Connecticut
AQI 27
Good
5.36μg/m³
PM2.5
15.72μg/m³
PM10
28.74ppb
O3
0.45ppb
SO2
14.65ppb
NO2
0.28ppm
CO
Westport, Connecticut
AQI 33
Good
5.59μg/m³
PM2.5
15.49μg/m³
PM10
30.20ppb
O3
0.40ppb
SO2
5.69ppb
NO2
0.28ppm
CO
Wilton, Connecticut
AQI 33
Good
5.54μg/m³
PM2.5
15.46μg/m³
PM10
29.15ppb
O3
0.42ppb
SO2
15.14ppb
NO2
0.28ppm
CO
Greenwich, Connecticut
AQI 33
Good
5.78μg/m³
PM2.5
30.64μg/m³
PM10
30.61ppb
O3
0.47ppb
SO2
14.83ppb
NO2
0.28ppm
CO
How accurate is Connecticut, USA air quality data?
Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Darien, Connecticut updated?
Air quality data for Darien, Connecticut is updated on an hourly basis.
When did Darien, Connecticut experience the worst air quality in the last 24 hours?
The worst air quality in Darien, Connecticut was recorded at 03:00:00 on 2025-11-03.
When did Darien, Connecticut have its best air quality in the last 24 hours?
The best air quality in Darien, Connecticut was recorded at 07:00:00 on 2025-11-02.
What is the real-time air quality index for Darien, Connecticut?
The real-time air quality index in Darien, Connecticut is 30, currently categorized as Good.
Which pollutant is found most often in Darien, Connecticut?
The most common pollutant in Darien, Connecticut is O3.
What can I do if the air quality in Darien, Connecticut is poor?
If the air quality in Darien, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Darien, Connecticut?
The measured PM2.5 levels in Darien, Connecticut at present are 4.128 μg/m3.
What are the current PM10 levels at Darien, Connecticut?
The current PM10 levels in Darien, Connecticut are 24.971 μg/m3.
What are the current carbon monoxide (CO) levels at Darien, Connecticut?
The current carbon monoxide (CO) level in Darien, Connecticut is 0.281 ppm.
What are the current sulfur dioxide (SO2) levels at Darien, Connecticut?
The current sulfur dioxide (SO2) levels in Darien, Connecticut are 0.431 ppb.
What are the current ozone (O3) levels at Darien, Connecticut?
The current ozone (O3) levels at Darien, Connecticut is 31.524 ppm.
What are the current nitrogen dioxide (NO2) levels at Darien, Connecticut?
The current nitrogen dioxide (NO2) levels at Darien, Connecticut is 15.185 ppb.
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