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)
16
Good
Norwich, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.36 μg/m³
0
55
155
255
425
605+
16.98 ppb
0
55
71
86
201
201+
0.52 ppb
0
36
76
186
605
1005+
2.98 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Norwich, Connecticut
Norwich, Connecticut
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AQI 18
Good
3.02μg/m³
PM2.5
7.77μg/m³
PM10
18.97ppb
O3
0.38ppb
SO2
3.04ppb
NO2
0.22ppm
CO
AQI 20
Good
2.81μg/m³
PM2.5
8.57μg/m³
PM10
21.70ppb
O3
0.38ppb
SO2
2.88ppb
NO2
0.21ppm
CO
AQI 16
Good
3.31μg/m³
PM2.5
8.57μg/m³
PM10
17.00ppb
O3
0.51ppb
SO2
2.98ppb
NO2
0.20ppm
CO
AQI 17
Good
3.09μg/m³
PM2.5
7.05μg/m³
PM10
17.78ppb
O3
0.38ppb
SO2
2.91ppb
NO2
0.22ppm
CO
AQI 17
Good
3.09μg/m³
PM2.5
7.05μg/m³
PM10
17.78ppb
O3
0.38ppb
SO2
2.91ppb
NO2
0.22ppm
CO
AQI 18
Good
3.04μg/m³
PM2.5
7.36μg/m³
PM10
18.57ppb
O3
0.38ppb
SO2
2.90ppb
NO2
0.22ppm
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 10:00:00 on 2026-11-12.
In the last 24 hours, the best air quality in Norwich, Connecticut was observed at 11:00:00 on 2026-11-12.
As of now, the AQI in Norwich, Connecticut is 16, 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 2.951 μg/m3.
The PM10 concentration in Norwich, Connecticut is 13.358 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Norwich, Connecticut is 0.22 ppm.
Currently, Norwich, Connecticut has a sulfur dioxide (SO2) concentration of 0.518 ppb.
The current ozone (O3) level in Norwich, Connecticut at the moment is 16.98 ppm.
Nitrogen dioxide (NO2) level in Norwich, Connecticut at the moment is 2.984 ppb.
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