Stay updated with real-time air quality in North Haven, 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)
19
Good
North Haven, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.86 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
2.16 μg/m³
0
55
155
255
425
605+
21.17 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
4.81 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
North Haven, Connecticut
North Haven, Connecticut
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AQI 19
Good
0.87μg/m³
PM2.5
2.09μg/m³
PM10
21.18ppb
O3
0.71ppb
SO2
4.72ppb
NO2
0.29ppm
CO
AQI 20
Good
0.86μg/m³
PM2.5
2.62μg/m³
PM10
21.50ppb
O3
0.73ppb
SO2
4.04ppb
NO2
0.27ppm
CO
AQI 20
Good
0.87μg/m³
PM2.5
2.44μg/m³
PM10
21.51ppb
O3
0.73ppb
SO2
4.22ppb
NO2
0.27ppm
CO
AQI 19
Good
0.80μg/m³
PM2.5
2.01μg/m³
PM10
21.03ppb
O3
0.74ppb
SO2
5.15ppb
NO2
0.30ppm
CO
AQI 19
Good
0.82μg/m³
PM2.5
2.07μg/m³
PM10
21.07ppb
O3
0.73ppb
SO2
5.05ppb
NO2
0.30ppm
CO
AQI 19
Good
0.84μg/m³
PM2.5
2.35μg/m³
PM10
21.39ppb
O3
0.72ppb
SO2
4.81ppb
NO2
0.29ppm
CO
Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for North Haven, Connecticut is updated on an hourly basis.
The worst air quality in North Haven, Connecticut was recorded at 03:00:00 on 2026-09-28.
The best air quality in North Haven, Connecticut was recorded at 09:00:00 on 2026-09-28.
The real-time air quality index in North Haven, Connecticut is 19, currently categorized as Good.
The most common pollutant in North Haven, Connecticut is O3.
If the air quality in North Haven, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in North Haven, Connecticut at present are 0.858 μg/m3.
The current PM10 levels in North Haven, Connecticut are 2.162 μg/m3.
The current carbon monoxide (CO) level in North Haven, Connecticut is 0.291 ppm.
The current sulfur dioxide (SO2) levels in North Haven, Connecticut are 0.722 ppb.
The current ozone (O3) levels at North Haven, Connecticut is 21.174 ppm.
The current nitrogen dioxide (NO2) levels at North Haven, Connecticut is 4.807 ppb.
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