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)
38
Good
Westport, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.62 μg/m³
0
55
155
255
425
605+
31.42 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
9.49 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Westport, Connecticut
Westport, Connecticut
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AQI 38
Good
7.08μg/m³
PM2.5
20.83μg/m³
PM10
31.10ppb
O3
0.58ppb
SO2
11.31ppb
NO2
0.23ppm
CO
AQI 38
Good
7.12μg/m³
PM2.5
19.54μg/m³
PM10
33.17ppb
O3
0.55ppb
SO2
11.13ppb
NO2
0.23ppm
CO
AQI 38
Good
7.35μg/m³
PM2.5
20.09μg/m³
PM10
37.46ppb
O3
0.46ppb
SO2
8.68ppb
NO2
0.23ppm
CO
AQI 33
Good
6.17μg/m³
PM2.5
14.51μg/m³
PM10
32.31ppb
O3
0.60ppb
SO2
14.54ppb
NO2
0.24ppm
CO
AQI 33
Good
5.54μg/m³
PM2.5
16.04μg/m³
PM10
32.28ppb
O3
0.71ppb
SO2
19.76ppb
NO2
0.25ppm
CO
AQI 38
Good
7.07μg/m³
PM2.5
18.80μg/m³
PM10
34.27ppb
O3
0.71ppb
SO2
17.98ppb
NO2
0.26ppm
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 01:00:00 on 2026-05-14.
In the last 24 hours, the best air quality in Westport, Connecticut was observed at 12:00:00 on 2026-05-14.
As of now, the AQI in Westport, Connecticut is 38, 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 6.608 μg/m3.
The PM10 concentration in Westport, Connecticut is 21.619 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westport, Connecticut is 0.269 ppm.
Currently, Westport, Connecticut has a sulfur dioxide (SO2) concentration of 0.582 ppb.
The current ozone (O3) level in Westport, Connecticut at the moment is 31.42 ppm.
Nitrogen dioxide (NO2) level in Westport, Connecticut at the moment is 9.489 ppb.
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