Stay updated with real-time air quality in Norwich, 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)
55
Moderate
Norwich, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
63.48 μg/m³
0
55
155
255
425
605+
43.49 ppb
0
55
71
86
201
201+
0.26 ppb
0
36
76
186
605
1005+
7.43 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Norwich, Connecticut
Norwich, Connecticut
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AQI 56
Moderate
11.60μg/m³
PM2.5
21.52μg/m³
PM10
28.64ppb
O3
0.22ppb
SO2
9.27ppb
NO2
0.28ppm
CO
AQI 54
Moderate
11.44μg/m³
PM2.5
22.42μg/m³
PM10
28.80ppb
O3
0.23ppb
SO2
9.32ppb
NO2
0.28ppm
CO
AQI 44
Good
8.47μg/m³
PM2.5
37.88μg/m³
PM10
24.54ppb
O3
0.21ppb
SO2
9.59ppb
NO2
0.30ppm
CO
AQI 56
Moderate
12.28μg/m³
PM2.5
18.13μg/m³
PM10
29.95ppb
O3
0.21ppb
SO2
9.16ppb
NO2
0.28ppm
CO
AQI 56
Moderate
12.28μg/m³
PM2.5
18.13μg/m³
PM10
29.95ppb
O3
0.21ppb
SO2
9.16ppb
NO2
0.28ppm
CO
AQI 56
Moderate
12.05μg/m³
PM2.5
19.39μg/m³
PM10
29.42ppb
O3
0.22ppb
SO2
9.19ppb
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 Norwich, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Norwich, Connecticut was at its worst at 03:00:00 on 2025-07-30.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 01:00:00 on 2025-07-30.
As of now, the AQI in Norwich, Connecticut is 49, indicating Good conditions.
Norwich, Connecticut air has the highest levels of PM2.5.
Poor air quality in Norwich, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Norwich, Connecticut are currently 8.824 μg/m3.
The PM10 concentration in Norwich, Connecticut is 25.204 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.287 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.21 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 27.516 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 10.913 ppb.
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