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
4.91 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.31 μg/m³
0
55
155
255
425
605+
27.98 ppb
0
55
71
86
201
201+
0.17 ppb
0
36
76
186
605
1005+
2.97 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Windham, Connecticut
Windham, Connecticut
Scroll To Air Quality MapLoading...
AQI 27
Good
5.34μg/m³
PM2.5
17.10μg/m³
PM10
26.21ppb
O3
0.17ppb
SO2
3.02ppb
NO2
0.20ppm
CO
AQI 27
Good
5.33μg/m³
PM2.5
15.52μg/m³
PM10
27.06ppb
O3
0.17ppb
SO2
3.14ppb
NO2
0.20ppm
CO
AQI 25
Good
3.77μg/m³
PM2.5
16.95μg/m³
PM10
27.35ppb
O3
0.31ppb
SO2
4.78ppb
NO2
0.21ppm
CO
AQI 33
Good
5.51μg/m³
PM2.5
15.54μg/m³
PM10
26.94ppb
O3
0.18ppb
SO2
4.38ppb
NO2
0.21ppm
CO
AQI 25
Good
3.68μg/m³
PM2.5
15.53μg/m³
PM10
26.82ppb
O3
0.31ppb
SO2
4.91ppb
NO2
0.21ppm
CO
AQI 27
Good
4.37μg/m³
PM2.5
14.92μg/m³
PM10
28.57ppb
O3
0.17ppb
SO2
6.17ppb
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 03:00:00 on 2026-08-14.
In the last 24 hours, the best air quality in Windham, Connecticut was observed at 04:00:00 on 2026-08-14.
As of now, the AQI in Windham, Connecticut is 27, indicating Good conditions.
Windham, Connecticut air has the highest levels of PM2.5.
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 4.574 μg/m3.
The PM10 concentration in Windham, Connecticut is 16.135 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Windham, Connecticut is 0.222 ppm.
Currently, Windham, Connecticut has a sulfur dioxide (SO2) concentration of 0.32 ppb.
The current ozone (O3) level in Windham, Connecticut at the moment is 23.019 ppm.
Nitrogen dioxide (NO2) level in Windham, Connecticut at the moment is 3.565 ppb.
All Rights Reserved © Ambee Inc. 2025