Stay updated with real-time air quality in North Branford, 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)
31
Good
North Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.86 μg/m³
0
55
155
255
425
605+
33.30 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
11.41 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
North Branford, Connecticut
North Branford, Connecticut
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AQI 60
Moderate
14.42μg/m³
PM2.5
21.34μg/m³
PM10
5.45ppb
O3
0.41ppb
SO2
20.33ppb
NO2
0.14ppm
CO
AQI 33
Good
5.52μg/m³
PM2.5
15.57μg/m³
PM10
21.01ppb
O3
0.32ppb
SO2
15.76ppb
NO2
0.29ppm
CO
AQI 62
Moderate
15.42μg/m³
PM2.5
22.37μg/m³
PM10
4.55ppb
O3
0.40ppb
SO2
20.84ppb
NO2
0.12ppm
CO
AQI 62
Moderate
14.69μg/m³
PM2.5
21.64μg/m³
PM10
4.64ppb
O3
0.40ppb
SO2
20.75ppb
NO2
0.16ppm
CO
AQI 62
Moderate
14.62μg/m³
PM2.5
21.43μg/m³
PM10
4.54ppb
O3
0.40ppb
SO2
20.54ppb
NO2
0.17ppm
CO
AQI 64
Moderate
15.82μg/m³
PM2.5
22.80μg/m³
PM10
4.19ppb
O3
0.40ppb
SO2
21.03ppb
NO2
0.10ppm
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 Branford, Connecticut is updated on an hourly basis.
The worst air quality in North Branford, Connecticut was recorded at 07:00:00 on 2025-11-03.
The best air quality in North Branford, Connecticut was recorded at 06:00:00 on 2025-11-02.
The real-time air quality index in North Branford, Connecticut is 49, currently categorized as Good.
The most common pollutant in North Branford, Connecticut is PM2.5.
If the air quality in North Branford, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in North Branford, Connecticut at present are 9.198 μg/m3.
The current PM10 levels in North Branford, Connecticut are 17.57 μg/m3.
The current carbon monoxide (CO) level in North Branford, Connecticut is 0.292 ppm.
The current sulfur dioxide (SO2) levels in North Branford, Connecticut are 0.577 ppb.
The current ozone (O3) levels at North Branford, Connecticut is 20.263 ppm.
The current nitrogen dioxide (NO2) levels at North Branford, Connecticut is 21.459 ppb.
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