Stay updated with real-time air quality in Granby, 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)
56
Moderate
Granby, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.38 μg/m³
0
55
155
255
425
605+
35.37 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
2.19 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Granby, Connecticut
Granby, Connecticut
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AQI 58
Moderate
12.56μg/m³
PM2.5
32.15μg/m³
PM10
35.17ppb
O3
0.21ppb
SO2
2.10ppb
NO2
0.15ppm
CO
AQI 56
Moderate
11.59μg/m³
PM2.5
38.66μg/m³
PM10
34.72ppb
O3
0.25ppb
SO2
3.68ppb
NO2
0.15ppm
CO
AQI 58
Moderate
12.62μg/m³
PM2.5
26.05μg/m³
PM10
35.01ppb
O3
0.22ppb
SO2
2.20ppb
NO2
0.14ppm
CO
AQI 58
Moderate
12.92μg/m³
PM2.5
21.58μg/m³
PM10
39.91ppb
O3
0.25ppb
SO2
3.28ppb
NO2
0.11ppm
CO
AQI 56
Moderate
12.32μg/m³
PM2.5
22.36μg/m³
PM10
39.50ppb
O3
0.26ppb
SO2
3.88ppb
NO2
0.14ppm
CO
AQI 58
Moderate
12.74μg/m³
PM2.5
21.11μg/m³
PM10
40.87ppb
O3
0.25ppb
SO2
2.72ppb
NO2
0.12ppm
CO
Air quality data and pollutant measurements for Connecticut, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Granby, Connecticut is updated every hour.
The worst air quality in Granby, Connecticut in the last 24 hours was observed at 06:00:00 on 2026-06-29.
In the last 24 hrs, the best air quality in Granby, Connecticut was observed at 08:00:00 on 2026-06-29.
The current air quality in Granby, Connecticut is 56, categorized as Moderate based on real-time data.
The most common pollutant in Granby, Connecticut is PM2.5.
If the air quality in Granby, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Granby, Connecticut is 11.602 μg/m3.
The current PM10 concentration at Granby, Connecticut is 21.383 μg/m3.
The current carbon monoxide (CO) concentration at Granby, Connecticut is 0.149 ppm.
The current sulfur dioxide (SO2) concentration at Granby, Connecticut is 0.235 ppb.
The current ozone (O3) concentration at Granby, Connecticut is 35.369 ppm.
The current nitrogen dioxide (NO2) concentration at Granby, Connecticut is 2.194 ppb.
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