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

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.81 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.10 μg/m³
0
55
155
255
425
605+
26.95 ppb
0
55
71
86
201
201+
0.30 ppb
0
36
76
186
605
1005+
3.91 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Granby, Connecticut
Granby, Connecticut
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AQI 33
Good
6.25μg/m³
PM2.5
18.19μg/m³
PM10
23.27ppb
O3
0.53ppb
SO2
3.41ppb
NO2
0.22ppm
CO
AQI 33
Good
6.01μg/m³
PM2.5
14.89μg/m³
PM10
23.90ppb
O3
0.53ppb
SO2
4.30ppb
NO2
0.21ppm
CO
AQI 33
Good
6.00μg/m³
PM2.5
19.41μg/m³
PM10
26.83ppb
O3
0.52ppb
SO2
3.87ppb
NO2
0.22ppm
CO
AQI 44
Good
7.57μg/m³
PM2.5
15.38μg/m³
PM10
25.10ppb
O3
0.51ppb
SO2
6.99ppb
NO2
0.20ppm
CO
AQI 33
Good
6.50μg/m³
PM2.5
25.90μg/m³
PM10
26.07ppb
O3
0.53ppb
SO2
5.33ppb
NO2
0.21ppm
CO
AQI 38
Good
7.31μg/m³
PM2.5
14.90μg/m³
PM10
24.62ppb
O3
0.51ppb
SO2
5.22ppb
NO2
0.20ppm
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 04:00:00 on 2026-08-14.
In the last 24 hrs, the best air quality in Granby, Connecticut was observed at 04:00:00 on 2026-08-14.
The current air quality in Granby, Connecticut is 33, categorized as Good 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 5.814 μg/m3.
The current PM10 concentration at Granby, Connecticut is 17.1 μg/m3.
The current carbon monoxide (CO) concentration at Granby, Connecticut is 0.19 ppm.
The current sulfur dioxide (SO2) concentration at Granby, Connecticut is 0.303 ppb.
The current ozone (O3) concentration at Granby, Connecticut is 26.955 ppm.
The current nitrogen dioxide (NO2) concentration at Granby, Connecticut is 3.912 ppb.
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