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)
44
Good
Westport, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.06 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
35.51 μg/m³
0
55
155
255
425
605+
24.37 ppb
0
55
71
86
201
201+
0.27 ppb
0
36
76
186
605
1005+
2.74 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westport, Connecticut
Westport, Connecticut
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AQI 44
Good
7.95μg/m³
PM2.5
31.16μg/m³
PM10
26.12ppb
O3
0.28ppb
SO2
3.41ppb
NO2
0.22ppm
CO
AQI 44
Good
7.93μg/m³
PM2.5
27.83μg/m³
PM10
26.32ppb
O3
0.28ppb
SO2
3.92ppb
NO2
0.22ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
21.99μg/m³
PM10
26.97ppb
O3
0.23ppb
SO2
4.61ppb
NO2
0.21ppm
CO
AQI 38
Good
6.98μg/m³
PM2.5
14.16μg/m³
PM10
26.29ppb
O3
0.33ppb
SO2
4.41ppb
NO2
0.25ppm
CO
AQI 38
Good
6.90μg/m³
PM2.5
14.18μg/m³
PM10
26.29ppb
O3
0.36ppb
SO2
4.55ppb
NO2
0.25ppm
CO
AQI 44
Good
7.74μg/m³
PM2.5
22.30μg/m³
PM10
25.38ppb
O3
0.37ppb
SO2
4.53ppb
NO2
0.25ppm
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 07:00:00 on 2026-08-14.
In the last 24 hours, the best air quality in Westport, Connecticut was observed at 05:00:00 on 2026-08-14.
As of now, the AQI in Westport, Connecticut is 44, indicating Good 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 8.058 μg/m3.
The PM10 concentration in Westport, Connecticut is 35.51 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westport, Connecticut is 0.218 ppm.
Currently, Westport, Connecticut has a sulfur dioxide (SO2) concentration of 0.269 ppb.
The current ozone (O3) level in Westport, Connecticut at the moment is 24.371 ppm.
Nitrogen dioxide (NO2) level in Westport, Connecticut at the moment is 2.737 ppb.
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