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

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.47 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.22 μg/m³
0
55
155
255
425
605+
27.29 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
10.44 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Simsbury, Connecticut
Simsbury, Connecticut
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AQI 33
Good
6.39μg/m³
PM2.5
21.71μg/m³
PM10
34.35ppb
O3
0.22ppb
SO2
15.66ppb
NO2
0.26ppm
CO
AQI 38
Good
6.99μg/m³
PM2.5
19.32μg/m³
PM10
35.52ppb
O3
0.22ppb
SO2
18.07ppb
NO2
0.29ppm
CO
AQI 31
Good
5.50μg/m³
PM2.5
13.42μg/m³
PM10
33.68ppb
O3
0.22ppb
SO2
13.94ppb
NO2
0.22ppm
CO
AQI 32
Good
5.34μg/m³
PM2.5
14.87μg/m³
PM10
34.52ppb
O3
0.21ppb
SO2
11.00ppb
NO2
0.23ppm
CO
AQI 38
Good
7.26μg/m³
PM2.5
20.04μg/m³
PM10
35.27ppb
O3
0.22ppb
SO2
19.00ppb
NO2
0.29ppm
CO
AQI 33
Good
6.04μg/m³
PM2.5
15.93μg/m³
PM10
36.17ppb
O3
0.22ppb
SO2
14.32ppb
NO2
0.28ppm
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 10:00:00 on 2026-05-13.
In the last 24 hours, the best air quality in Simsbury, Connecticut was observed at 01:00:00 on 2026-05-13.
As of now, the AQI in Simsbury, Connecticut is 33, indicating Good conditions.
Simsbury, Connecticut air has the highest levels of PM2.5.
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 6.107 μg/m3.
The PM10 concentration in Simsbury, Connecticut is 17.419 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Simsbury, Connecticut is 0.235 ppm.
Currently, Simsbury, Connecticut has a sulfur dioxide (SO2) concentration of 0.214 ppb.
The current ozone (O3) level in Simsbury, Connecticut at the moment is 27.588 ppm.
Nitrogen dioxide (NO2) level in Simsbury, Connecticut at the moment is 11.778 ppb.
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