Stay updated with real-time air quality in Shelton, 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)
49
Good
Shelton, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.02 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.34 μg/m³
0
55
155
255
425
605+
23.77 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
12.96 ppb
0
54
101
361
1250
2050+
0.33 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Shelton, Connecticut
Shelton, Connecticut
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AQI 44
Good
7.71μg/m³
PM2.5
31.06μg/m³
PM10
25.60ppb
O3
0.42ppb
SO2
10.68ppb
NO2
0.30ppm
CO
AQI 44
Good
7.71μg/m³
PM2.5
31.06μg/m³
PM10
25.60ppb
O3
0.42ppb
SO2
10.68ppb
NO2
0.30ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
23.47μg/m³
PM10
26.09ppb
O3
0.42ppb
SO2
10.10ppb
NO2
0.30ppm
CO
AQI 44
Good
7.69μg/m³
PM2.5
31.07μg/m³
PM10
25.44ppb
O3
0.43ppb
SO2
10.62ppb
NO2
0.29ppm
CO
AQI 49
Good
8.55μg/m³
PM2.5
40.87μg/m³
PM10
24.31ppb
O3
0.42ppb
SO2
10.17ppb
NO2
0.30ppm
CO
AQI 44
Good
8.49μg/m³
PM2.5
35.18μg/m³
PM10
26.36ppb
O3
0.40ppb
SO2
9.82ppb
NO2
0.31ppm
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 Shelton, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Shelton, Connecticut was at its worst at 02:00:00 on 2026-01-19.
In the last 24 hours, the best air quality in Shelton, Connecticut was observed at 07:00:00 on 2026-01-19.
As of now, the AQI in Shelton, Connecticut is 49, indicating Good conditions.
Shelton, Connecticut air has the highest levels of PM2.5.
Poor air quality in Shelton, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Shelton, Connecticut are currently 9.016 μg/m3.
The PM10 concentration in Shelton, Connecticut is 31.336 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Shelton, Connecticut is 0.327 ppm.
Currently, Shelton, Connecticut has a sulfur dioxide (SO2) concentration of 0.359 ppb.
The current ozone (O3) level in Shelton, Connecticut at the moment is 23.775 ppm.
Nitrogen dioxide (NO2) level in Shelton, Connecticut at the moment is 12.963 ppb.
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