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)
27
Good
Windham, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.17 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.20 μg/m³
0
55
155
255
425
605+
29.09 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
9.58 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Windham, Connecticut
Windham, Connecticut
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AQI 29
Good
4.26μg/m³
PM2.5
8.85μg/m³
PM10
31.03ppb
O3
0.26ppb
SO2
8.20ppb
NO2
0.28ppm
CO
AQI 31
Good
4.75μg/m³
PM2.5
8.92μg/m³
PM10
34.34ppb
O3
0.26ppb
SO2
8.21ppb
NO2
0.29ppm
CO
AQI 28
Good
3.80μg/m³
PM2.5
11.39μg/m³
PM10
30.32ppb
O3
0.29ppb
SO2
9.92ppb
NO2
0.27ppm
CO
AQI 31
Good
4.78μg/m³
PM2.5
8.99μg/m³
PM10
34.31ppb
O3
0.28ppb
SO2
8.16ppb
NO2
0.27ppm
CO
AQI 29
Good
3.78μg/m³
PM2.5
13.74μg/m³
PM10
30.89ppb
O3
0.29ppb
SO2
10.02ppb
NO2
0.26ppm
CO
AQI 31
Good
4.28μg/m³
PM2.5
8.83μg/m³
PM10
33.20ppb
O3
0.29ppb
SO2
8.20ppb
NO2
0.27ppm
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 2026-08-16.
In the last 24 hours, the best air quality in Windham, Connecticut was observed at 03:00:00 on 2026-08-17.
As of now, the AQI in Windham, Connecticut is 29, 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 4.255 μg/m3.
The PM10 concentration in Windham, Connecticut is 9.192 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Windham, Connecticut is 0.272 ppm.
Currently, Windham, Connecticut has a sulfur dioxide (SO2) concentration of 0.276 ppb.
The current ozone (O3) level in Windham, Connecticut at the moment is 31.053 ppm.
Nitrogen dioxide (NO2) level in Windham, Connecticut at the moment is 8.23 ppb.
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