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

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.88 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
3.23 μg/m³
0
55
155
255
425
605+
20.75 ppb
0
55
71
86
201
201+
0.68 ppb
0
36
76
186
605
1005+
3.06 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Simsbury, Connecticut
Simsbury, Connecticut
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AQI 19
Good
1.25μg/m³
PM2.5
2.94μg/m³
PM10
21.47ppb
O3
0.67ppb
SO2
3.94ppb
NO2
0.27ppm
CO
AQI 20
Good
1.09μg/m³
PM2.5
2.79μg/m³
PM10
21.95ppb
O3
0.67ppb
SO2
4.36ppb
NO2
0.29ppm
CO
AQI 19
Good
0.90μg/m³
PM2.5
3.37μg/m³
PM10
20.31ppb
O3
0.68ppb
SO2
3.22ppb
NO2
0.24ppm
CO
AQI 19
Good
0.86μg/m³
PM2.5
3.32μg/m³
PM10
20.56ppb
O3
0.68ppb
SO2
2.96ppb
NO2
0.24ppm
CO
AQI 20
Good
1.07μg/m³
PM2.5
2.59μg/m³
PM10
21.91ppb
O3
0.67ppb
SO2
4.37ppb
NO2
0.29ppm
CO
AQI 20
Good
1.10μg/m³
PM2.5
3.08μg/m³
PM10
21.95ppb
O3
0.67ppb
SO2
4.30ppb
NO2
0.29ppm
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 Simsbury, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Simsbury, Connecticut was at its worst at 03:00:00 on 2026-09-28.
In the last 24 hours, the best air quality in Simsbury, Connecticut was observed at 10:00:00 on 2026-09-28.
As of now, the AQI in Simsbury, Connecticut is 19, indicating Good conditions.
Simsbury, Connecticut air has the highest levels of O3.
Poor air quality in Simsbury, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Simsbury, Connecticut are currently 0.878 μg/m3.
The PM10 concentration in Simsbury, Connecticut is 3.227 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Simsbury, Connecticut is 0.246 ppm.
Currently, Simsbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.677 ppb.
The current ozone (O3) level in Simsbury, Connecticut at the moment is 20.747 ppm.
Nitrogen dioxide (NO2) level in Simsbury, Connecticut at the moment is 3.064 ppb.
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