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

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.88 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.39 μg/m³
0
55
155
255
425
605+
30.31 ppb
0
55
71
86
201
201+
0.17 ppb
0
36
76
186
605
1005+
3.37 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Simsbury, Connecticut
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AQI 27
Good
3.05μg/m³
PM2.5
5.97μg/m³
PM10
28.83ppb
O3
0.22ppb
SO2
2.78ppb
NO2
0.13ppm
CO
AQI 27
Good
2.98μg/m³
PM2.5
5.73μg/m³
PM10
28.70ppb
O3
0.23ppb
SO2
3.00ppb
NO2
0.11ppm
CO
AQI 27
Good
3.02μg/m³
PM2.5
6.42μg/m³
PM10
28.84ppb
O3
0.22ppb
SO2
3.06ppb
NO2
0.14ppm
CO
AQI 28
Good
3.01μg/m³
PM2.5
10.84μg/m³
PM10
29.73ppb
O3
0.23ppb
SO2
3.14ppb
NO2
0.14ppm
CO
AQI 27
Good
2.93μg/m³
PM2.5
5.53μg/m³
PM10
28.86ppb
O3
0.23ppb
SO2
3.23ppb
NO2
0.11ppm
CO
AQI 26
Good
3.14μg/m³
PM2.5
5.99μg/m³
PM10
28.04ppb
O3
0.23ppb
SO2
2.52ppb
NO2
0.11ppm
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 02:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Simsbury, Connecticut was observed at 07:00:00 on 2026-02-11.
As of now, the AQI in Simsbury, Connecticut is 28, 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 2.878 μg/m3.
The PM10 concentration in Simsbury, Connecticut is 9.394 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Simsbury, Connecticut is 0.115 ppm.
Currently, Simsbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.174 ppb.
The current ozone (O3) level in Simsbury, Connecticut at the moment is 30.31 ppm.
Nitrogen dioxide (NO2) level in Simsbury, Connecticut at the moment is 3.368 ppb.
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