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)
31
Good
Connecticut, USA
Last updated: ... (Local time)
Major air pollutants in Connecticut, USA
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
3.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
7.39 μg/m³
0
55
155
255
425
605+
Ozone (O3)
32.99 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.20 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
3.05 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Connecticut, USA
Connecticut, USA
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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 27
Good
4.71μg/m³
PM2.5
19.24μg/m³
PM10
11.64ppb
O3
0.45ppb
SO2
6.90ppb
NO2
0.25ppm
CO
Rhode Island, USA
AQI 18
Good
3.35μg/m³
PM2.5
12.56μg/m³
PM10
18.89ppb
O3
0.27ppb
SO2
2.73ppb
NO2
0.19ppm
CO
Massachusetts, USA
AQI 18
Good
2.14μg/m³
PM2.5
7.80μg/m³
PM10
18.57ppb
O3
0.29ppb
SO2
3.13ppb
NO2
0.15ppm
CO
New Jersey, USA
AQI 33
Good
6.15μg/m³
PM2.5
26.80μg/m³
PM10
10.69ppb
O3
0.64ppb
SO2
11.40ppb
NO2
0.28ppm
CO
New Hampshire, USA
AQI 17
Good
1.85μg/m³
PM2.5
4.43μg/m³
PM10
18.20ppb
O3
0.33ppb
SO2
2.80ppb
NO2
0.16ppm
CO
Vermont, USA
AQI 17
Good
2.20μg/m³
PM2.5
7.46μg/m³
PM10
18.43ppb
O3
0.23ppb
SO2
3.01ppb
NO2
0.14ppm
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 10:00:00 on 2025-11-02.
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 03:00:00 on 2025-11-02.
What is the AQI in Connecticut, USA right now?
As of now, the AQI in Connecticut, USA is 16, indicating Good conditions.
What is the most common type of pollution in Connecticut, USA?
Connecticut, USA air has the highest levels of O3.
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 3.221 μg/m3.
What is the PM10 level in Connecticut, USA at the moment?
The PM10 concentration in Connecticut, USA is 8.461 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 0.123 ppm.
What is the sulfur dioxide (SO2) level in Connecticut, USA at the moment?
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.225 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 17.226 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 3.25 ppb.
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