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)
20
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)
0.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
2.79 μg/m³
0
55
155
255
425
605+
Ozone (O3)
22.33 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.49 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
3.82 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
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 20
Good
2.03μg/m³
PM2.5
8.44μg/m³
PM10
22.00ppb
O3
0.39ppb
SO2
3.98ppb
NO2
0.21ppm
CO
Rhode Island, USA
AQI 23
Good
1.47μg/m³
PM2.5
5.57μg/m³
PM10
24.84ppb
O3
0.39ppb
SO2
5.58ppb
NO2
0.29ppm
CO
Massachusetts, USA
AQI 23
Good
1.25μg/m³
PM2.5
4.85μg/m³
PM10
25.18ppb
O3
0.67ppb
SO2
3.65ppb
NO2
0.24ppm
CO
New Jersey, USA
AQI 19
Good
1.64μg/m³
PM2.5
6.36μg/m³
PM10
21.12ppb
O3
0.33ppb
SO2
6.68ppb
NO2
0.23ppm
CO
New Hampshire, USA
AQI 22
Good
0.74μg/m³
PM2.5
3.24μg/m³
PM10
23.75ppb
O3
0.78ppb
SO2
1.62ppb
NO2
0.17ppm
CO
Vermont, USA
AQI 20
Good
2.35μg/m³
PM2.5
6.35μg/m³
PM10
21.65ppb
O3
0.33ppb
SO2
2.01ppb
NO2
0.15ppm
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 2026-09-28.
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 07:00:00 on 2026-09-28.
What is the AQI in Connecticut, USA right now?
As of now, the AQI in Connecticut, USA is 21, 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 0.99 μg/m3.
What is the PM10 level in Connecticut, USA at the moment?
The PM10 concentration in Connecticut, USA is 3.102 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 0.259 ppm.
What is the sulfur dioxide (SO2) level in Connecticut, USA at the moment?
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.512 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 23.263 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 3.813 ppb.
All Rights Reserved © Ambee Inc. 2025