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)
22
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)
4.03 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
11.59 μg/m³
0
55
155
255
425
605+
Ozone (O3)
20.08 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.48 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
5.63 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
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 23
Good
3.04μg/m³
PM2.5
17.54μg/m³
PM10
24.60ppb
O3
0.69ppb
SO2
6.39ppb
NO2
0.29ppm
CO
Rhode Island, USA
AQI 24
Good
2.32μg/m³
PM2.5
12.42μg/m³
PM10
25.82ppb
O3
0.40ppb
SO2
2.93ppb
NO2
0.16ppm
CO
Massachusetts, USA
AQI 22
Good
3.62μg/m³
PM2.5
16.95μg/m³
PM10
24.16ppb
O3
0.60ppb
SO2
4.18ppb
NO2
0.17ppm
CO
New Jersey, USA
AQI 27
Good
5.44μg/m³
PM2.5
28.80μg/m³
PM10
27.25ppb
O3
0.94ppb
SO2
19.35ppb
NO2
0.40ppm
CO
New Hampshire, USA
AQI 20
Good
3.44μg/m³
PM2.5
12.04μg/m³
PM10
21.50ppb
O3
0.88ppb
SO2
2.54ppb
NO2
0.14ppm
CO
Vermont, USA
AQI 19
Good
2.78μg/m³
PM2.5
9.50μg/m³
PM10
20.92ppb
O3
0.32ppb
SO2
4.18ppb
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 04:00:00 on 2026-11-12.
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 06:00:00 on 2026-11-12.
What is the AQI in Connecticut, USA right now?
As of now, the AQI in Connecticut, USA is 22, indicating Good 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 4.028 μg/m3.
What is the PM10 level in Connecticut, USA at the moment?
The PM10 concentration in Connecticut, USA is 11.589 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 0.265 ppm.
What is the sulfur dioxide (SO2) level in Connecticut, USA at the moment?
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.479 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 20.084 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 5.633 ppb.
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