Stay updated with real-time air quality in Westport, Connecticut 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)
52
Moderate
Westport, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
45.09 μg/m³
0
55
155
255
425
605+
48.04 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
2.14 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westport, Connecticut
Westport, Connecticut
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AQI 52
Moderate
10.42μg/m³
PM2.5
48.80μg/m³
PM10
35.08ppb
O3
0.46ppb
SO2
4.99ppb
NO2
0.23ppm
CO
AQI 52
Moderate
10.44μg/m³
PM2.5
43.31μg/m³
PM10
35.25ppb
O3
0.45ppb
SO2
5.10ppb
NO2
0.23ppm
CO
AQI 54
Moderate
11.49μg/m³
PM2.5
34.37μg/m³
PM10
37.75ppb
O3
0.36ppb
SO2
5.28ppb
NO2
0.23ppm
CO
AQI 54
Moderate
11.24μg/m³
PM2.5
22.95μg/m³
PM10
31.33ppb
O3
0.52ppb
SO2
5.40ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.77μg/m³
PM2.5
35.75μg/m³
PM10
30.82ppb
O3
0.57ppb
SO2
5.29ppb
NO2
0.24ppm
CO
AQI 54
Moderate
10.94μg/m³
PM2.5
48.14μg/m³
PM10
35.90ppb
O3
0.59ppb
SO2
6.24ppb
NO2
0.24ppm
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 Westport, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Westport, Connecticut was at its worst at 09:00:00 on 2026-06-28.
In the last 24 hours, the best air quality in Westport, Connecticut was observed at 09:00:00 on 2026-06-29.
As of now, the AQI in Westport, Connecticut is 52, indicating Moderate conditions.
Westport, Connecticut air has the highest levels of PM2.5.
Poor air quality in Westport, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Westport, Connecticut are currently 10.13 μg/m3.
The PM10 concentration in Westport, Connecticut is 45.094 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westport, Connecticut is 0.229 ppm.
Currently, Westport, Connecticut has a sulfur dioxide (SO2) concentration of 0.484 ppb.
The current ozone (O3) level in Westport, Connecticut at the moment is 48.043 ppm.
Nitrogen dioxide (NO2) level in Westport, Connecticut at the moment is 2.144 ppb.
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