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)
35
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)
5.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
15.63 μg/m³
0
55
155
255
425
605+
Ozone (O3)
38.04 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.34 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
11.37 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.21 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 34
Good
3.99μg/m³
PM2.5
17.10μg/m³
PM10
37.31ppb
O3
0.64ppb
SO2
5.35ppb
NO2
0.20ppm
CO
Rhode Island, USA
AQI 43
Good
4.57μg/m³
PM2.5
18.88μg/m³
PM10
45.82ppb
O3
0.21ppb
SO2
4.24ppb
NO2
0.13ppm
CO
Massachusetts, USA
AQI 40
Good
4.89μg/m³
PM2.5
19.00μg/m³
PM10
43.21ppb
O3
0.39ppb
SO2
5.08ppb
NO2
0.16ppm
CO
New Jersey, USA
AQI 39
Good
4.08μg/m³
PM2.5
17.39μg/m³
PM10
41.51ppb
O3
0.86ppb
SO2
8.64ppb
NO2
0.24ppm
CO
New Hampshire, USA
AQI 31
Good
4.99μg/m³
PM2.5
17.93μg/m³
PM10
34.49ppb
O3
0.57ppb
SO2
5.24ppb
NO2
0.14ppm
CO
Vermont, USA
AQI 33
Good
5.93μg/m³
PM2.5
24.70μg/m³
PM10
31.35ppb
O3
0.50ppb
SO2
3.22ppb
NO2
0.12ppm
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 02:00:00 on 2026-05-14.
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 2026-05-13.
What is the AQI in Connecticut, USA right now?
As of now, the AQI in Connecticut, USA is 42, 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 5.119 μg/m3.
What is the PM10 level in Connecticut, USA at the moment?
The PM10 concentration in Connecticut, USA is 15.158 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 0.154 ppm.
What is the sulfur dioxide (SO2) level in Connecticut, USA at the moment?
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.336 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 44.939 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 4.651 ppb.
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