Stay updated with real-time air quality in Cheshire, 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)
21
Good
Cheshire, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.85 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
2.92 μg/m³
0
55
155
255
425
605+
22.54 ppb
0
55
71
86
201
201+
0.74 ppb
0
36
76
186
605
1005+
4.17 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cheshire, Connecticut
Cheshire, Connecticut
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AQI 20
Good
0.86μg/m³
PM2.5
2.62μg/m³
PM10
21.50ppb
O3
0.73ppb
SO2
4.04ppb
NO2
0.27ppm
CO
AQI 20
Good
0.86μg/m³
PM2.5
2.71μg/m³
PM10
22.23ppb
O3
0.73ppb
SO2
4.03ppb
NO2
0.26ppm
CO
AQI 20
Good
0.89μg/m³
PM2.5
3.47μg/m³
PM10
22.16ppb
O3
0.74ppb
SO2
4.19ppb
NO2
0.25ppm
CO
AQI 20
Good
0.98μg/m³
PM2.5
2.01μg/m³
PM10
21.65ppb
O3
0.74ppb
SO2
3.81ppb
NO2
0.26ppm
CO
AQI 20
Good
1.00μg/m³
PM2.5
2.06μg/m³
PM10
21.66ppb
O3
0.74ppb
SO2
3.85ppb
NO2
0.26ppm
CO
AQI 20
Good
1.00μg/m³
PM2.5
2.00μg/m³
PM10
21.66ppb
O3
0.75ppb
SO2
3.73ppb
NO2
0.26ppm
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 Cheshire, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Cheshire, Connecticut was at its worst at 03:00:00 on 2026-09-28.
In the last 24 hours, the best air quality in Cheshire, Connecticut was observed at 07:00:00 on 2026-09-28.
As of now, the AQI in Cheshire, Connecticut is 21, indicating Good conditions.
Cheshire, Connecticut air has the highest levels of O3.
Poor air quality in Cheshire, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Cheshire, Connecticut are currently 0.849 μg/m3.
The PM10 concentration in Cheshire, Connecticut is 2.923 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Cheshire, Connecticut is 0.262 ppm.
Currently, Cheshire, Connecticut has a sulfur dioxide (SO2) concentration of 0.743 ppb.
The current ozone (O3) level in Cheshire, Connecticut at the moment is 22.535 ppm.
Nitrogen dioxide (NO2) level in Cheshire, Connecticut at the moment is 4.165 ppb.
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