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

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.15 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.12 μg/m³
0
55
155
255
425
605+
47.57 ppb
0
55
71
86
201
201+
0.27 ppb
0
36
76
186
605
1005+
5.52 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Cromwell, Connecticut
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AQI 44
Good
5.14μg/m³
PM2.5
14.20μg/m³
PM10
47.87ppb
O3
0.27ppb
SO2
5.43ppb
NO2
0.22ppm
CO
AQI 43
Good
5.07μg/m³
PM2.5
10.97μg/m³
PM10
46.38ppb
O3
0.27ppb
SO2
6.03ppb
NO2
0.24ppm
CO
AQI 43
Good
5.01μg/m³
PM2.5
14.01μg/m³
PM10
46.37ppb
O3
0.27ppb
SO2
5.50ppb
NO2
0.24ppm
CO
AQI 44
Good
4.99μg/m³
PM2.5
16.05μg/m³
PM10
46.70ppb
O3
0.25ppb
SO2
5.28ppb
NO2
0.23ppm
CO
AQI 43
Good
5.27μg/m³
PM2.5
13.72μg/m³
PM10
45.98ppb
O3
0.27ppb
SO2
6.35ppb
NO2
0.28ppm
CO
AQI 43
Good
5.33μg/m³
PM2.5
13.75μg/m³
PM10
46.06ppb
O3
0.27ppb
SO2
6.74ppb
NO2
0.27ppm
CO
Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Cromwell, Connecticut is updated on an hourly basis.
The worst air quality in Cromwell, Connecticut was recorded at 09:00:00 on 2026-03-29.
The best air quality in Cromwell, Connecticut was recorded at 06:00:00 on 2026-03-29.
The real-time air quality index in Cromwell, Connecticut is 44, currently categorized as Good.
The most common pollutant in Cromwell, Connecticut is O3.
If the air quality in Cromwell, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Cromwell, Connecticut at present are 5.153 μg/m3.
The current PM10 levels in Cromwell, Connecticut are 14.121 μg/m3.
The current carbon monoxide (CO) level in Cromwell, Connecticut is 0.23 ppm.
The current sulfur dioxide (SO2) levels in Cromwell, Connecticut are 0.269 ppb.
The current ozone (O3) levels at Cromwell, Connecticut is 47.571 ppm.
The current nitrogen dioxide (NO2) levels at Cromwell, Connecticut is 5.52 ppb.
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