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
7.89 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.55 μg/m³
0
55
155
255
425
605+
25.89 ppb
0
55
71
86
201
201+
0.21 ppb
0
36
76
186
605
1005+
9.38 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Cromwell, Connecticut
Cromwell, Connecticut
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AQI 58
Moderate
12.94μg/m³
PM2.5
47.30μg/m³
PM10
23.48ppb
O3
0.28ppb
SO2
19.07ppb
NO2
0.49ppm
CO
AQI 56
Moderate
12.17μg/m³
PM2.5
26.91μg/m³
PM10
19.52ppb
O3
0.29ppb
SO2
19.07ppb
NO2
0.54ppm
CO
AQI 56
Moderate
11.93μg/m³
PM2.5
19.35μg/m³
PM10
7.40ppb
O3
0.27ppb
SO2
19.70ppb
NO2
0.52ppm
CO
AQI 52
Moderate
10.17μg/m³
PM2.5
35.72μg/m³
PM10
19.10ppb
O3
0.32ppb
SO2
20.43ppb
NO2
0.51ppm
CO
AQI 58
Moderate
13.47μg/m³
PM2.5
21.35μg/m³
PM10
8.51ppb
O3
0.31ppb
SO2
21.09ppb
NO2
0.65ppm
CO
AQI 60
Moderate
13.52μg/m³
PM2.5
22.03μg/m³
PM10
8.89ppb
O3
0.31ppb
SO2
21.81ppb
NO2
0.64ppm
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 05:00:00 on 2025-11-03.
The best air quality in Cromwell, Connecticut was recorded at 03:00:00 on 2025-11-02.
The real-time air quality index in Cromwell, Connecticut is 56, currently categorized as Moderate.
The most common pollutant in Cromwell, Connecticut is PM2.5.
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 12.256 μg/m3.
The current PM10 levels in Cromwell, Connecticut are 24.149 μg/m3.
The current carbon monoxide (CO) level in Cromwell, Connecticut is 0.497 ppm.
The current sulfur dioxide (SO2) levels in Cromwell, Connecticut are 0.336 ppb.
The current ozone (O3) levels at Cromwell, Connecticut is 20.52 ppm.
The current nitrogen dioxide (NO2) levels at Cromwell, Connecticut is 21.648 ppb.
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