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)
19
Good
Westport, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.71 μg/m³
0
55
155
255
425
605+
20.98 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
8.43 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westport, Connecticut
Westport, Connecticut
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AQI 22
Good
3.51μg/m³
PM2.5
13.00μg/m³
PM10
21.78ppb
O3
0.59ppb
SO2
7.77ppb
NO2
0.30ppm
CO
AQI 22
Good
3.73μg/m³
PM2.5
12.26μg/m³
PM10
21.84ppb
O3
0.58ppb
SO2
7.34ppb
NO2
0.30ppm
CO
AQI 22
Good
4.09μg/m³
PM2.5
10.74μg/m³
PM10
21.54ppb
O3
0.58ppb
SO2
5.30ppb
NO2
0.29ppm
CO
AQI 19
Good
3.24μg/m³
PM2.5
13.78μg/m³
PM10
20.78ppb
O3
0.70ppb
SO2
6.23ppb
NO2
0.30ppm
CO
AQI 21
Good
3.11μg/m³
PM2.5
15.67μg/m³
PM10
23.02ppb
O3
0.71ppb
SO2
7.12ppb
NO2
0.30ppm
CO
AQI 20
Good
3.16μg/m³
PM2.5
13.81μg/m³
PM10
22.15ppb
O3
0.91ppb
SO2
6.34ppb
NO2
0.30ppm
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 08:00:00 on 2026-11-12.
In the last 24 hours, the best air quality in Westport, Connecticut was observed at 11:00:00 on 2026-11-12.
As of now, the AQI in Westport, Connecticut is 19, 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 3.437 μg/m3.
The PM10 concentration in Westport, Connecticut is 13.709 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westport, Connecticut is 0.298 ppm.
Currently, Westport, Connecticut has a sulfur dioxide (SO2) concentration of 0.58 ppb.
The current ozone (O3) level in Westport, Connecticut at the moment is 20.983 ppm.
Nitrogen dioxide (NO2) level in Westport, Connecticut at the moment is 8.427 ppb.
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