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)
58
Moderate
Shelton, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
49.67 μg/m³
0
55
155
255
425
605+
9.53 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
21.51 ppb
0
54
101
361
1250
2050+
0.39 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Shelton, Connecticut
Shelton, Connecticut
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AQI 58
Moderate
12.99μg/m³
PM2.5
49.67μg/m³
PM10
9.53ppb
O3
0.24ppb
SO2
21.51ppb
NO2
0.39ppm
CO
AQI 58
Moderate
12.99μg/m³
PM2.5
49.67μg/m³
PM10
9.53ppb
O3
0.24ppb
SO2
21.51ppb
NO2
0.39ppm
CO
AQI 56
Moderate
12.29μg/m³
PM2.5
51.07μg/m³
PM10
10.27ppb
O3
0.24ppb
SO2
21.45ppb
NO2
0.37ppm
CO
AQI 60
Moderate
14.30μg/m³
PM2.5
58.61μg/m³
PM10
8.97ppb
O3
0.24ppb
SO2
20.18ppb
NO2
0.39ppm
CO
AQI 60
Moderate
14.46μg/m³
PM2.5
58.51μg/m³
PM10
11.89ppb
O3
0.25ppb
SO2
21.39ppb
NO2
0.40ppm
CO
AQI 58
Moderate
13.16μg/m³
PM2.5
29.85μg/m³
PM10
12.02ppb
O3
0.22ppb
SO2
24.65ppb
NO2
0.39ppm
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 07:00:00 on 2025-12-28.
In the last 24 hours, the best air quality in Shelton, Connecticut was observed at 12:00:00 on 2025-12-28.
As of now, the AQI in Shelton, Connecticut is 58, 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 12.989 μg/m3.
The PM10 concentration in Shelton, Connecticut is 49.674 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Shelton, Connecticut is 0.385 ppm.
Currently, Shelton, Connecticut has a sulfur dioxide (SO2) concentration of 0.24 ppb.
The current ozone (O3) level in Shelton, Connecticut at the moment is 9.532 ppm.
Nitrogen dioxide (NO2) level in Shelton, Connecticut at the moment is 21.506 ppb.
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