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)
56
Moderate
Norwich, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.39 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
48.24 μg/m³
0
55
155
255
425
605+
33.44 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
19.93 ppb
0
54
101
361
1250
2050+
0.46 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Norwich, Connecticut
Norwich, Connecticut
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AQI 33
Good
6.17μg/m³
PM2.5
15.27μg/m³
PM10
23.27ppb
O3
0.29ppb
SO2
20.47ppb
NO2
0.47ppm
CO
AQI 33
Good
5.72μg/m³
PM2.5
14.60μg/m³
PM10
24.84ppb
O3
0.30ppb
SO2
19.55ppb
NO2
0.46ppm
CO
AQI 33
Good
6.46μg/m³
PM2.5
27.80μg/m³
PM10
35.12ppb
O3
0.39ppb
SO2
20.18ppb
NO2
0.45ppm
CO
AQI 33
Good
5.51μg/m³
PM2.5
10.09μg/m³
PM10
22.11ppb
O3
0.28ppb
SO2
19.34ppb
NO2
0.45ppm
CO
AQI 33
Good
5.51μg/m³
PM2.5
10.09μg/m³
PM10
22.11ppb
O3
0.28ppb
SO2
19.34ppb
NO2
0.45ppm
CO
AQI 33
Good
5.73μg/m³
PM2.5
11.75μg/m³
PM10
22.41ppb
O3
0.28ppb
SO2
19.70ppb
NO2
0.46ppm
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 2025-12-28.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 08:00:00 on 2025-12-28.
As of now, the AQI in Norwich, Connecticut is 56, indicating Moderate 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 12.386 μg/m3.
The PM10 concentration in Norwich, Connecticut is 48.242 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.457 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.351 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 33.44 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 19.927 ppb.
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