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)
28
Good
Shelton, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.23 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.60 μg/m³
0
55
155
255
425
605+
29.80 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
11.13 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Shelton, Connecticut
Shelton, Connecticut
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AQI 52
Moderate
9.79μg/m³
PM2.5
44.40μg/m³
PM10
11.65ppb
O3
0.25ppb
SO2
20.05ppb
NO2
0.41ppm
CO
AQI 52
Moderate
9.79μg/m³
PM2.5
44.40μg/m³
PM10
11.65ppb
O3
0.25ppb
SO2
20.05ppb
NO2
0.41ppm
CO
AQI 52
Moderate
10.47μg/m³
PM2.5
47.22μg/m³
PM10
5.43ppb
O3
0.27ppb
SO2
21.27ppb
NO2
0.41ppm
CO
AQI 52
Moderate
9.68μg/m³
PM2.5
44.27μg/m³
PM10
10.80ppb
O3
0.24ppb
SO2
19.14ppb
NO2
0.41ppm
CO
AQI 38
Good
7.01μg/m³
PM2.5
30.10μg/m³
PM10
11.61ppb
O3
0.21ppb
SO2
20.89ppb
NO2
0.38ppm
CO
AQI 56
Moderate
12.34μg/m³
PM2.5
35.36μg/m³
PM10
7.63ppb
O3
0.24ppb
SO2
18.75ppb
NO2
0.40ppm
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 01:00:00 on 2025-11-03.
In the last 24 hours, the best air quality in Shelton, Connecticut was observed at 05:00:00 on 2025-11-02.
As of now, the AQI in Shelton, Connecticut is 60, indicating Moderate 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 14.05 μg/m3.
The PM10 concentration in Shelton, Connecticut is 24.194 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Shelton, Connecticut is 0.278 ppm.
Currently, Shelton, Connecticut has a sulfur dioxide (SO2) concentration of 0.372 ppb.
The current ozone (O3) level in Shelton, Connecticut at the moment is 6.692 ppm.
Nitrogen dioxide (NO2) level in Shelton, Connecticut at the moment is 16.384 ppb.
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