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)
38
Good
Norwich, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.02 μg/m³
0
55
155
255
425
605+
23.86 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
8.05 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Norwich, Connecticut
Norwich, Connecticut
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AQI 49
Good
8.62μg/m³
PM2.5
15.02μg/m³
PM10
22.86ppb
O3
0.33ppb
SO2
13.98ppb
NO2
0.59ppm
CO
AQI 44
Good
7.95μg/m³
PM2.5
16.25μg/m³
PM10
23.13ppb
O3
0.34ppb
SO2
13.31ppb
NO2
0.59ppm
CO
AQI 33
Good
6.23μg/m³
PM2.5
21.90μg/m³
PM10
15.38ppb
O3
0.38ppb
SO2
8.27ppb
NO2
0.59ppm
CO
AQI 49
Good
8.59μg/m³
PM2.5
13.06μg/m³
PM10
24.02ppb
O3
0.33ppb
SO2
13.59ppb
NO2
0.57ppm
CO
AQI 49
Good
8.59μg/m³
PM2.5
13.06μg/m³
PM10
24.02ppb
O3
0.33ppb
SO2
13.59ppb
NO2
0.57ppm
CO
AQI 49
Good
8.62μg/m³
PM2.5
13.62μg/m³
PM10
23.62ppb
O3
0.33ppb
SO2
13.73ppb
NO2
0.58ppm
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 2025-11-03.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 04:00:00 on 2025-11-02.
As of now, the AQI in Norwich, Connecticut is 33, 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 5.976 μg/m3.
The PM10 concentration in Norwich, Connecticut is 25.731 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.582 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.375 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 14.479 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 13.45 ppb.
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