Stay updated with real-time air quality in Windham, 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)
44
Good
Windham, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.05 μg/m³
0
55
155
255
425
605+
47.67 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
3.95 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Windham, Connecticut
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AQI 44
Good
4.72μg/m³
PM2.5
18.53μg/m³
PM10
47.62ppb
O3
0.26ppb
SO2
4.44ppb
NO2
0.20ppm
CO
AQI 44
Good
4.73μg/m³
PM2.5
14.78μg/m³
PM10
47.52ppb
O3
0.27ppb
SO2
4.59ppb
NO2
0.20ppm
CO
AQI 44
Good
4.77μg/m³
PM2.5
14.05μg/m³
PM10
48.05ppb
O3
0.31ppb
SO2
3.13ppb
NO2
0.21ppm
CO
AQI 44
Good
4.72μg/m³
PM2.5
18.37μg/m³
PM10
47.62ppb
O3
0.28ppb
SO2
5.11ppb
NO2
0.19ppm
CO
AQI 44
Good
3.97μg/m³
PM2.5
16.76μg/m³
PM10
47.43ppb
O3
0.34ppb
SO2
3.12ppb
NO2
0.21ppm
CO
AQI 44
Good
4.63μg/m³
PM2.5
19.97μg/m³
PM10
47.51ppb
O3
0.31ppb
SO2
2.97ppb
NO2
0.20ppm
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 Windham, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Windham, Connecticut was at its worst at 10:00:00 on 2026-03-29.
In the last 24 hours, the best air quality in Windham, Connecticut was observed at 01:00:00 on 2026-03-29.
As of now, the AQI in Windham, Connecticut is 44, indicating Good conditions.
Windham, Connecticut air has the highest levels of O3.
Poor air quality in Windham, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Windham, Connecticut are currently 4.704 μg/m3.
The PM10 concentration in Windham, Connecticut is 20.049 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Windham, Connecticut is 0.202 ppm.
Currently, Windham, Connecticut has a sulfur dioxide (SO2) concentration of 0.241 ppb.
The current ozone (O3) level in Windham, Connecticut at the moment is 47.668 ppm.
Nitrogen dioxide (NO2) level in Windham, Connecticut at the moment is 3.948 ppb.
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