Stay updated with real-time air quality in Stamford, 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)
62
Moderate
Stamford, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
14.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
65.15 μg/m³
0
55
155
255
425
605+
29.05 ppb
0
55
71
86
201
201+
1.18 ppb
0
36
76
186
605
1005+
25.02 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Stamford, Connecticut
Stamford, Connecticut
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AQI 119
Unhealthy for sensitive groups
8.21μg/m³
PM2.5
31.05μg/m³
PM10
76.05ppb
O3
1.39ppb
SO2
3.23ppb
NO2
0.37ppm
CO
AQI 151
Unhealthy
12.63μg/m³
PM2.5
50.42μg/m³
PM10
85.54ppb
O3
1.94ppb
SO2
3.62ppb
NO2
0.39ppm
CO
AQI 54
Moderate
10.67μg/m³
PM2.5
50.82μg/m³
PM10
43.55ppb
O3
1.27ppb
SO2
2.83ppb
NO2
0.37ppm
CO
AQI 129
Unhealthy for sensitive groups
11.83μg/m³
PM2.5
47.56μg/m³
PM10
79.48ppb
O3
2.06ppb
SO2
4.36ppb
NO2
0.40ppm
CO
AQI 133
Unhealthy for sensitive groups
11.83μg/m³
PM2.5
49.18μg/m³
PM10
80.04ppb
O3
1.29ppb
SO2
2.33ppb
NO2
0.36ppm
CO
AQI 87
Moderate
9.82μg/m³
PM2.5
40.60μg/m³
PM10
65.59ppb
O3
2.26ppb
SO2
5.76ppb
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 Stamford, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Stamford, Connecticut was at its worst at 11:00:00 on 2025-07-29.
In the last 24 hours, the best air quality in Stamford, Connecticut was observed at 12:00:00 on 2025-07-29.
As of now, the AQI in Stamford, Connecticut is 151, indicating Unhealthy conditions.
Stamford, Connecticut air has the highest levels of O3.
Poor air quality in Stamford, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Stamford, Connecticut are currently 12.715 μg/m3.
The PM10 concentration in Stamford, Connecticut is 50.508 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Stamford, Connecticut is 0.387 ppm.
Currently, Stamford, Connecticut has a sulfur dioxide (SO2) concentration of 1.821 ppb.
The current ozone (O3) level in Stamford, Connecticut at the moment is 86.251 ppm.
Nitrogen dioxide (NO2) level in Stamford, Connecticut at the moment is 3.084 ppb.
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