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)
28
Good
Connecticut, USA
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.41 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.57 μg/m³
0
55
155
255
425
605+
30.41 ppb
0
55
71
86
201
201+
0.21 ppb
0
36
76
186
605
1005+
2.78 ppb
0
54
101
361
1250
2050+
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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City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
---|
AQI 33
Good
5.63μg/m³
PM2.5
23.37μg/m³
PM10
28.72ppb
O3
1.14ppb
SO2
2.78ppb
NO2
0.22ppm
CO
AQI 24
Good
2.73μg/m³
PM2.5
11.17μg/m³
PM10
25.89ppb
O3
0.95ppb
SO2
2.62ppb
NO2
0.21ppm
CO
AQI 22
Good
3.79μg/m³
PM2.5
15.11μg/m³
PM10
23.52ppb
O3
0.91ppb
SO2
3.59ppb
NO2
0.21ppm
CO
AQI 20
Good
3.49μg/m³
PM2.5
15.16μg/m³
PM10
21.91ppb
O3
1.46ppb
SO2
3.25ppb
NO2
0.23ppm
CO
AQI 22
Good
4.41μg/m³
PM2.5
17.52μg/m³
PM10
21.97ppb
O3
0.94ppb
SO2
3.77ppb
NO2
0.17ppm
CO
AQI 38
Good
7.42μg/m³
PM2.5
29.08μg/m³
PM10
31.22ppb
O3
0.69ppb
SO2
2.78ppb
NO2
0.20ppm
CO
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
The air quality information for Connecticut, USA is updated every hour for accuracy.
In the past 24 hours, the air quality in Connecticut, USA was at its worst at 10:00:00 on 2025-07-12.
In the last 24 hours, the best air quality in Connecticut, USA was observed at 05:00:00 on 2025-07-13.
As of now, the AQI in Connecticut, USA is 27, indicating Good conditions.
Connecticut, USA air has the highest levels of O3.
Poor air quality in Connecticut, USA means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Connecticut, USA are currently 3.188 μg/m3.
The PM10 concentration in Connecticut, USA is 11.088 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Connecticut, USA is 0.246 ppm.
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 1.103 ppb.
The current ozone (O3) level in Connecticut, USA at the moment is 29.194 ppm.
Nitrogen dioxide (NO2) level in Connecticut, USA at the moment is 2.808 ppb.
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