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)
44
Good
Norwich, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.25 μg/m³
0
55
155
255
425
605+
37.27 ppb
0
55
71
86
201
201+
0.22 ppb
0
36
76
186
605
1005+
4.10 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Norwich, Connecticut
Norwich, Connecticut
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AQI 52
Moderate
10.41μg/m³
PM2.5
19.28μg/m³
PM10
39.64ppb
O3
0.28ppb
SO2
7.09ppb
NO2
0.18ppm
CO
AQI 52
Moderate
10.28μg/m³
PM2.5
21.99μg/m³
PM10
38.48ppb
O3
0.29ppb
SO2
6.80ppb
NO2
0.18ppm
CO
AQI 44
Good
7.78μg/m³
PM2.5
23.23μg/m³
PM10
37.29ppb
O3
0.21ppb
SO2
4.14ppb
NO2
0.20ppm
CO
AQI 54
Moderate
10.88μg/m³
PM2.5
16.11μg/m³
PM10
39.99ppb
O3
0.28ppb
SO2
7.58ppb
NO2
0.19ppm
CO
AQI 54
Moderate
10.88μg/m³
PM2.5
16.11μg/m³
PM10
39.99ppb
O3
0.28ppb
SO2
7.58ppb
NO2
0.19ppm
CO
AQI 54
Moderate
10.72μg/m³
PM2.5
17.13μg/m³
PM10
39.94ppb
O3
0.28ppb
SO2
7.43ppb
NO2
0.19ppm
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 06:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 01:00:00 on 2026-06-29.
As of now, the AQI in Norwich, Connecticut is 44, 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 7.726 μg/m3.
The PM10 concentration in Norwich, Connecticut is 28.249 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.184 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.218 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 37.275 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 4.101 ppb.
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