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)
41
Good
Stamford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.43 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
23.93 μg/m³
0
55
155
255
425
605+
43.80 ppb
0
55
71
86
201
201+
0.26 ppb
0
36
76
186
605
1005+
4.35 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Stamford, Connecticut
Stamford, Connecticut
Scroll To Air Quality MapLoading...
AQI 41
Good
5.90μg/m³
PM2.5
14.35μg/m³
PM10
44.02ppb
O3
0.24ppb
SO2
5.12ppb
NO2
0.23ppm
CO
AQI 41
Good
5.25μg/m³
PM2.5
24.29μg/m³
PM10
43.54ppb
O3
0.27ppb
SO2
4.55ppb
NO2
0.24ppm
CO
AQI 32
Good
4.70μg/m³
PM2.5
12.84μg/m³
PM10
35.24ppb
O3
0.23ppb
SO2
3.59ppb
NO2
0.23ppm
CO
AQI 40
Good
4.88μg/m³
PM2.5
22.73μg/m³
PM10
43.32ppb
O3
0.27ppb
SO2
4.67ppb
NO2
0.24ppm
CO
AQI 42
Good
6.12μg/m³
PM2.5
16.07μg/m³
PM10
44.63ppb
O3
0.21ppb
SO2
2.67ppb
NO2
0.22ppm
CO
AQI 39
Good
3.91μg/m³
PM2.5
17.96μg/m³
PM10
42.15ppb
O3
0.28ppb
SO2
4.80ppb
NO2
0.25ppm
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 10:00:00 on 2026-08-18.
In the last 24 hours, the best air quality in Stamford, Connecticut was observed at 12:00:00 on 2026-08-18.
As of now, the AQI in Stamford, Connecticut is 41, indicating Good 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 5.435 μg/m3.
The PM10 concentration in Stamford, Connecticut is 23.934 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Stamford, Connecticut is 0.236 ppm.
Currently, Stamford, Connecticut has a sulfur dioxide (SO2) concentration of 0.26 ppb.
The current ozone (O3) level in Stamford, Connecticut at the moment is 43.801 ppm.
Nitrogen dioxide (NO2) level in Stamford, Connecticut at the moment is 4.349 ppb.
All Rights Reserved © Ambee Inc. 2025