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)
33
Good
Shelton, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.51 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.88 μg/m³
0
55
155
255
425
605+
36.14 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
1.81 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Shelton, Connecticut
Shelton, Connecticut
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AQI 33
Good
2.51μg/m³
PM2.5
12.88μg/m³
PM10
36.14ppb
O3
0.37ppb
SO2
1.81ppb
NO2
0.17ppm
CO
AQI 33
Good
2.51μg/m³
PM2.5
12.88μg/m³
PM10
36.14ppb
O3
0.37ppb
SO2
1.81ppb
NO2
0.17ppm
CO
AQI 31
Good
2.48μg/m³
PM2.5
7.41μg/m³
PM10
33.12ppb
O3
0.37ppb
SO2
1.84ppb
NO2
0.18ppm
CO
AQI 34
Good
2.47μg/m³
PM2.5
13.39μg/m³
PM10
37.10ppb
O3
0.36ppb
SO2
1.84ppb
NO2
0.17ppm
CO
AQI 32
Good
2.49μg/m³
PM2.5
8.69μg/m³
PM10
34.72ppb
O3
0.40ppb
SO2
1.71ppb
NO2
0.16ppm
CO
AQI 33
Good
2.42μg/m³
PM2.5
9.70μg/m³
PM10
36.07ppb
O3
0.41ppb
SO2
1.66ppb
NO2
0.17ppm
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 09:00:00 on 2026-06-14.
In the last 24 hours, the best air quality in Shelton, Connecticut was observed at 06:00:00 on 2026-06-15.
As of now, the AQI in Shelton, Connecticut is 33, indicating Good conditions.
Shelton, Connecticut air has the highest levels of O3.
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 2.509 μg/m3.
The PM10 concentration in Shelton, Connecticut is 12.881 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Shelton, Connecticut is 0.173 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 36.136 ppm.
Nitrogen dioxide (NO2) level in Shelton, Connecticut at the moment is 1.815 ppb.
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