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)
56
Moderate
Connecticut, USA
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
12.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
32.49 μg/m³
0
55
155
255
425
605+
26.43 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
12.78 ppb
0
54
101
361
1250
2050+
0.22 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 58
Moderate
12.66μg/m³
PM2.5
55.31μg/m³
PM10
29.10ppb
O3
1.31ppb
SO2
13.48ppb
NO2
0.33ppm
CO
AQI 56
Moderate
12.10μg/m³
PM2.5
53.69μg/m³
PM10
34.03ppb
O3
0.22ppb
SO2
17.48ppb
NO2
0.30ppm
CO
AQI 52
Moderate
9.88μg/m³
PM2.5
38.44μg/m³
PM10
35.96ppb
O3
0.32ppb
SO2
15.84ppb
NO2
0.28ppm
CO
AQI 62
Moderate
14.71μg/m³
PM2.5
60.02μg/m³
PM10
34.48ppb
O3
2.05ppb
SO2
14.65ppb
NO2
0.42ppm
CO
AQI 44
Good
8.40μg/m³
PM2.5
36.09μg/m³
PM10
19.67ppb
O3
0.38ppb
SO2
14.69ppb
NO2
0.28ppm
CO
AQI 62
Moderate
14.84μg/m³
PM2.5
54.42μg/m³
PM10
27.36ppb
O3
0.20ppb
SO2
10.29ppb
NO2
0.28ppm
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 03:00:00 on 2025-07-30.
In the last 24 hours, the best air quality in Connecticut, USA was observed at 01:00:00 on 2025-07-30.
As of now, the AQI in Connecticut, USA is 60, indicating Moderate conditions.
Connecticut, USA air has the highest levels of PM2.5.
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 13.715 μg/m3.
The PM10 concentration in Connecticut, USA is 40.962 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Connecticut, USA is 0.264 ppm.
Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.571 ppb.
The current ozone (O3) level in Connecticut, USA at the moment is 37.739 ppm.
Nitrogen dioxide (NO2) level in Connecticut, USA at the moment is 15.422 ppb.
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