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)
54
Moderate
Granby, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
33.22 μg/m³
0
55
155
255
425
605+
17.84 ppb
0
55
71
86
201
201+
0.18 ppb
0
36
76
186
605
1005+
8.82 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Granby, Connecticut
Granby, Connecticut
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AQI 60
Moderate
14.26μg/m³
PM2.5
41.24μg/m³
PM10
9.23ppb
O3
0.20ppb
SO2
11.23ppb
NO2
0.40ppm
CO
AQI 62
Moderate
15.01μg/m³
PM2.5
46.61μg/m³
PM10
12.78ppb
O3
0.21ppb
SO2
11.56ppb
NO2
0.40ppm
CO
AQI 62
Moderate
15.04μg/m³
PM2.5
39.57μg/m³
PM10
10.78ppb
O3
0.20ppb
SO2
11.18ppb
NO2
0.42ppm
CO
AQI 62
Moderate
14.89μg/m³
PM2.5
25.33μg/m³
PM10
16.22ppb
O3
0.22ppb
SO2
14.37ppb
NO2
0.48ppm
CO
AQI 62
Moderate
15.09μg/m³
PM2.5
55.22μg/m³
PM10
19.90ppb
O3
0.23ppb
SO2
13.19ppb
NO2
0.43ppm
CO
AQI 62
Moderate
15.26μg/m³
PM2.5
25.74μg/m³
PM10
16.61ppb
O3
0.22ppb
SO2
13.85ppb
NO2
0.47ppm
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 01:00:00 on 2025-07-28.
In the last 24 hrs, the best air quality in Granby, Connecticut was observed at 09:00:00 on 2025-07-28.
The current air quality in Granby, Connecticut is 64, 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 15.77 μg/m3.
The current PM10 concentration at Granby, Connecticut is 38.344 μg/m3.
The current carbon monoxide (CO) concentration at Granby, Connecticut is 0.438 ppm.
The current sulfur dioxide (SO2) concentration at Granby, Connecticut is 0.156 ppb.
The current ozone (O3) concentration at Granby, Connecticut is 14.611 ppm.
The current nitrogen dioxide (NO2) concentration at Granby, Connecticut is 10.013 ppb.
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