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)
17
Good
Cromwell, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.93 μg/m³
0
55
155
255
425
605+
18.00 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
4.84 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Cromwell, Connecticut
Cromwell, Connecticut
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AQI 16
Good
2.51μg/m³
PM2.5
9.25μg/m³
PM10
17.41ppb
O3
0.37ppb
SO2
4.80ppb
NO2
0.24ppm
CO
AQI 24
Good
2.80μg/m³
PM2.5
9.42μg/m³
PM10
25.72ppb
O3
0.37ppb
SO2
4.84ppb
NO2
0.23ppm
CO
AQI 22
Good
2.49μg/m³
PM2.5
9.83μg/m³
PM10
23.94ppb
O3
0.37ppb
SO2
4.73ppb
NO2
0.23ppm
CO
AQI 28
Good
2.50μg/m³
PM2.5
7.63μg/m³
PM10
30.24ppb
O3
0.37ppb
SO2
4.83ppb
NO2
0.23ppm
CO
AQI 19
Good
3.00μg/m³
PM2.5
7.32μg/m³
PM10
19.61ppb
O3
0.29ppb
SO2
5.04ppb
NO2
0.21ppm
CO
AQI 19
Good
2.94μg/m³
PM2.5
7.27μg/m³
PM10
20.00ppb
O3
0.30ppb
SO2
4.89ppb
NO2
0.21ppm
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 2026-09-12.
The best air quality in Cromwell, Connecticut was recorded at 08:00:00 on 2026-09-13.
The real-time air quality index in Cromwell, Connecticut is 17, 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 2.575 μg/m3.
The current PM10 levels in Cromwell, Connecticut are 8.932 μg/m3.
The current carbon monoxide (CO) level in Cromwell, Connecticut is 0.233 ppm.
The current sulfur dioxide (SO2) levels in Cromwell, Connecticut are 0.359 ppb.
The current ozone (O3) levels at Cromwell, Connecticut is 18.005 ppm.
The current nitrogen dioxide (NO2) levels at Cromwell, Connecticut is 4.842 ppb.
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