Live air quality index in Connecticut, USA today
Stay updated with real-time air quality in Connecticut, USA 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)
52
Moderate
Connecticut, USA
Last updated: ... (Local time)
Major air pollutants in Connecticut, USA
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
10.05 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
40.27 μg/m³
0
55
155
255
425
605+
Ozone (O3)
26.16 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.29 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
16.61 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.35 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Connecticut, USA
Connecticut, USA
Scroll To Air Quality Map
Track live Connecticut, USA air quality forecast and history
Connecticut Loading...
Connecticut, USA air quality map: Stay updated on AQI near you
Air quality in cities of Connecticut, USA
| No results found | |||||||
| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
Air quality in nearby states
New York, USA
AQI 52
Moderate
10.26μg/m³
PM2.5
45.69μg/m³
PM10
20.44ppb
O3
0.39ppb
SO2
9.88ppb
NO2
0.34ppm
CO
Rhode Island, USA
AQI 44
Good
7.82μg/m³
PM2.5
33.77μg/m³
PM10
33.07ppb
O3
0.41ppb
SO2
10.51ppb
NO2
0.30ppm
CO
Massachusetts, USA
AQI 33
Good
5.95μg/m³
PM2.5
28.20μg/m³
PM10
30.98ppb
O3
0.46ppb
SO2
9.54ppb
NO2
0.29ppm
CO
New Jersey, USA
AQI 56
Moderate
12.06μg/m³
PM2.5
52.27μg/m³
PM10
18.30ppb
O3
0.52ppb
SO2
11.08ppb
NO2
0.47ppm
CO
New Hampshire, USA
AQI 33
Good
6.24μg/m³
PM2.5
28.32μg/m³
PM10
34.64ppb
O3
0.82ppb
SO2
6.51ppb
NO2
0.20ppm
CO
Vermont, USA
AQI 49
Good
9.07μg/m³
PM2.5
35.97μg/m³
PM10
27.48ppb
O3
0.34ppb
SO2
6.76ppb
NO2
0.22ppm
CO
How accurate is Connecticut, USA air quality data?
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
Frequently asked questions
How often is air quality information updated for Connecticut, USA?
The air quality information for Connecticut, USA is updated every hour for accuracy.
What time in the last 24 hours was the air quality in Connecticut, USA at its worst?
In the past 24 hours, the air quality in Connecticut, USA was at its worst at 03:00:00 on 2025-12-28.
When did Connecticut, USA experience the best air quality in the last 24 hours?
In the last 24 hours, the best air quality in Connecticut, USA was observed at 10:00:00 on 2025-12-27.
What is the AQI in Connecticut, USA right now?
As of now, the AQI in Connecticut, USA is 52, indicating Moderate conditions.
What is the most common type of pollution in Connecticut, USA?
Connecticut, USA air has the highest levels of PM2.5.
What should I do in case of poor air quality in Connecticut, USA?
Poor air quality in Connecticut, USA means it's advisable to stay indoors and wear a mask for your protection.
What is the PM2.5 level in Connecticut, USA at the moment?
PM2.5 levels in Connecticut, USA are currently 9.557 μg/m3.
What is the PM10 level in Connecticut, USA at the moment?
The PM10 concentration in Connecticut, USA is 36.655 μg/m3 at the moment.
What is the carbon monoxide (CO) level in Connecticut, USA at the moment?
The current carbon monoxide (CO) concentration in Connecticut, USA is 0.313 ppm.
What is the sulfur dioxide (SO2) level in Connecticut, USA at the moment?
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.277 ppb.
What is the ozone (O3) level in Connecticut, USA at the moment?
The current ozone (O3) level in Connecticut, USA at the moment is 25.506 ppm.
What is the nitrogen dioxide (NO2) level in Connecticut, USA at the moment?
Nitrogen dioxide (NO2) level in Connecticut, USA at the moment is 14.991 ppb.
All Rights Reserved © Ambee Inc. 2025