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)
25
Good
Simsbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.13 μg/m³
0
55
155
255
425
605+
27.13 ppb
0
55
71
86
201
201+
0.40 ppb
0
36
76
186
605
1005+
1.18 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Simsbury, Connecticut
Simsbury, Connecticut
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AQI 29
Good
1.60μg/m³
PM2.5
3.77μg/m³
PM10
31.42ppb
O3
0.22ppb
SO2
3.56ppb
NO2
0.10ppm
CO
AQI 30
Good
1.59μg/m³
PM2.5
3.79μg/m³
PM10
31.91ppb
O3
0.23ppb
SO2
2.59ppb
NO2
0.10ppm
CO
AQI 30
Good
1.54μg/m³
PM2.5
5.03μg/m³
PM10
32.06ppb
O3
0.19ppb
SO2
4.09ppb
NO2
0.10ppm
CO
AQI 31
Good
1.48μg/m³
PM2.5
5.35μg/m³
PM10
33.09ppb
O3
0.20ppb
SO2
4.07ppb
NO2
0.10ppm
CO
AQI 29
Good
1.61μg/m³
PM2.5
3.80μg/m³
PM10
31.45ppb
O3
0.22ppb
SO2
2.81ppb
NO2
0.10ppm
CO
AQI 31
Good
1.59μg/m³
PM2.5
3.54μg/m³
PM10
32.80ppb
O3
0.23ppb
SO2
2.43ppb
NO2
0.10ppm
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 01:00:00 on 2025-11-03.
In the last 24 hours, the best air quality in Simsbury, Connecticut was observed at 06:00:00 on 2025-11-04.
As of now, the AQI in Simsbury, Connecticut is 31, 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 1.484 μg/m3.
The PM10 concentration in Simsbury, Connecticut is 3.729 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Simsbury, Connecticut is 0.107 ppm.
Currently, Simsbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.183 ppb.
The current ozone (O3) level in Simsbury, Connecticut at the moment is 33.481 ppm.
Nitrogen dioxide (NO2) level in Simsbury, Connecticut at the moment is 1.958 ppb.
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