Stay updated with real-time air quality in Groton, 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)
52
Moderate
Groton, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.14 μg/m³
0
55
155
255
425
605+
51.98 ppb
0
55
71
86
201
201+
0.27 ppb
0
36
76
186
605
1005+
6.67 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Groton, Connecticut
Groton, Connecticut
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AQI 54
Moderate
10.89μg/m³
PM2.5
18.13μg/m³
PM10
33.98ppb
O3
0.12ppb
SO2
7.86ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.76μg/m³
PM2.5
19.49μg/m³
PM10
33.70ppb
O3
0.13ppb
SO2
7.85ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.54μg/m³
PM2.5
23.06μg/m³
PM10
33.88ppb
O3
0.17ppb
SO2
7.53ppb
NO2
0.26ppm
CO
AQI 49
Good
9.12μg/m³
PM2.5
37.26μg/m³
PM10
28.50ppb
O3
0.27ppb
SO2
8.00ppb
NO2
0.26ppm
CO
AQI 54
Moderate
10.52μg/m³
PM2.5
21.72μg/m³
PM10
33.30ppb
O3
0.15ppb
SO2
7.82ppb
NO2
0.26ppm
CO
AQI 52
Moderate
9.67μg/m³
PM2.5
32.33μg/m³
PM10
30.93ppb
O3
0.18ppb
SO2
7.18ppb
NO2
0.26ppm
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 Groton, Connecticut is updated every hour.
The worst air quality in Groton, Connecticut in the last 24 hours was observed at 09:00:00 on 2025-07-29.
In the last 24 hrs, the best air quality in Groton, Connecticut was observed at 02:00:00 on 2025-07-30.
The current air quality in Groton, Connecticut is 54, categorized as Moderate based on real-time data.
The most common pollutant in Groton, Connecticut is PM2.5.
If the air quality in Groton, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Groton, Connecticut is 10.887 μg/m3.
The current PM10 concentration at Groton, Connecticut is 18.134 μg/m3.
The current carbon monoxide (CO) concentration at Groton, Connecticut is 0.261 ppm.
The current sulfur dioxide (SO2) concentration at Groton, Connecticut is 0.12 ppb.
The current ozone (O3) concentration at Groton, Connecticut is 33.975 ppm.
The current nitrogen dioxide (NO2) concentration at Groton, Connecticut is 7.862 ppb.
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