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
4.76 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.15 μg/m³
0
55
155
255
425
605+
41.09 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
10.66 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Norwich, Connecticut
Norwich, Connecticut
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AQI 42
Good
5.91μg/m³
PM2.5
16.34μg/m³
PM10
45.25ppb
O3
0.26ppb
SO2
15.38ppb
NO2
0.26ppm
CO
AQI 41
Good
5.53μg/m³
PM2.5
16.18μg/m³
PM10
44.15ppb
O3
0.27ppb
SO2
15.79ppb
NO2
0.26ppm
CO
AQI 41
Good
5.47μg/m³
PM2.5
17.76μg/m³
PM10
43.63ppb
O3
0.26ppb
SO2
13.30ppb
NO2
0.27ppm
CO
AQI 44
Good
6.38μg/m³
PM2.5
16.97μg/m³
PM10
46.94ppb
O3
0.25ppb
SO2
16.09ppb
NO2
0.26ppm
CO
AQI 44
Good
6.38μg/m³
PM2.5
16.97μg/m³
PM10
46.94ppb
O3
0.25ppb
SO2
16.09ppb
NO2
0.26ppm
CO
AQI 43
Good
6.24μg/m³
PM2.5
16.74μg/m³
PM10
46.44ppb
O3
0.25ppb
SO2
15.83ppb
NO2
0.26ppm
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 02:00:00 on 2026-05-14.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 12:00:00 on 2026-05-13.
As of now, the AQI in Norwich, Connecticut is 38, indicating Good conditions.
Norwich, Connecticut air has the highest levels of O3.
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 4.756 μg/m3.
The PM10 concentration in Norwich, Connecticut is 17.146 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.284 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.236 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 41.091 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 10.657 ppb.
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