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)
33
Good
Westport, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.51 μg/m³
0
55
155
255
425
605+
30.98 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
2.82 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westport, Connecticut
Westport, Connecticut
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AQI 28
Good
3.05μg/m³
PM2.5
7.30μg/m³
PM10
29.70ppb
O3
0.32ppb
SO2
4.15ppb
NO2
0.20ppm
CO
AQI 27
Good
3.13μg/m³
PM2.5
7.18μg/m³
PM10
29.34ppb
O3
0.32ppb
SO2
4.28ppb
NO2
0.19ppm
CO
AQI 28
Good
2.62μg/m³
PM2.5
5.12μg/m³
PM10
29.84ppb
O3
0.29ppb
SO2
4.15ppb
NO2
0.18ppm
CO
AQI 29
Good
2.97μg/m³
PM2.5
6.99μg/m³
PM10
30.71ppb
O3
0.33ppb
SO2
4.73ppb
NO2
0.27ppm
CO
AQI 28
Good
2.87μg/m³
PM2.5
8.43μg/m³
PM10
29.92ppb
O3
0.37ppb
SO2
7.16ppb
NO2
0.28ppm
CO
AQI 29
Good
2.85μg/m³
PM2.5
6.42μg/m³
PM10
31.13ppb
O3
0.41ppb
SO2
9.71ppb
NO2
0.29ppm
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 2025-11-01.
In the last 24 hours, the best air quality in Westport, Connecticut was observed at 12:00:00 on 2025-11-02.
As of now, the AQI in Westport, Connecticut is 28, indicating Good conditions.
Westport, Connecticut air has the highest levels of O3.
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 2.947 μg/m3.
The PM10 concentration in Westport, Connecticut is 6.977 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westport, Connecticut is 0.193 ppm.
Currently, Westport, Connecticut has a sulfur dioxide (SO2) concentration of 0.318 ppb.
The current ozone (O3) level in Westport, Connecticut at the moment is 30.016 ppm.
Nitrogen dioxide (NO2) level in Westport, Connecticut at the moment is 3.859 ppb.
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