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)
27
Good
Norwich, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.37 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.92 μg/m³
0
55
155
255
425
605+
28.57 ppb
0
55
71
86
201
201+
0.17 ppb
0
36
76
186
605
1005+
6.17 ppb
0
54
101
361
1250
2050+
0.20 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
5.93μg/m³
PM2.5
13.10μg/m³
PM10
27.37ppb
O3
0.33ppb
SO2
5.44ppb
NO2
0.22ppm
CO
AQI 27
Good
5.39μg/m³
PM2.5
12.11μg/m³
PM10
26.44ppb
O3
0.32ppb
SO2
5.49ppb
NO2
0.23ppm
CO
AQI 22
Good
4.44μg/m³
PM2.5
17.00μg/m³
PM10
23.54ppb
O3
0.32ppb
SO2
5.56ppb
NO2
0.21ppm
CO
AQI 33
Good
6.29μg/m³
PM2.5
13.00μg/m³
PM10
27.98ppb
O3
0.33ppb
SO2
5.75ppb
NO2
0.23ppm
CO
AQI 33
Good
6.29μg/m³
PM2.5
13.00μg/m³
PM10
27.98ppb
O3
0.33ppb
SO2
5.75ppb
NO2
0.23ppm
CO
AQI 33
Good
6.18μg/m³
PM2.5
13.07μg/m³
PM10
27.82ppb
O3
0.33ppb
SO2
5.64ppb
NO2
0.23ppm
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 05:00:00 on 2026-08-14.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 04:00:00 on 2026-08-14.
As of now, the AQI in Norwich, Connecticut is 27, 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 4.37 μg/m3.
The PM10 concentration in Norwich, Connecticut is 14.922 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.205 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.174 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 28.567 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 6.168 ppb.
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