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)
37
Good
North Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.69 μg/m³
0
55
155
255
425
605+
40.49 ppb
0
55
71
86
201
201+
0.14 ppb
0
36
76
186
605
1005+
3.46 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
North Branford, Connecticut
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AQI 39
Good
2.37μg/m³
PM2.5
7.81μg/m³
PM10
42.30ppb
O3
0.11ppb
SO2
3.45ppb
NO2
0.11ppm
CO
AQI 37
Good
2.91μg/m³
PM2.5
7.86μg/m³
PM10
40.36ppb
O3
0.15ppb
SO2
3.44ppb
NO2
0.14ppm
CO
AQI 40
Good
2.33μg/m³
PM2.5
7.36μg/m³
PM10
42.72ppb
O3
0.10ppb
SO2
3.48ppb
NO2
0.10ppm
CO
AQI 39
Good
2.44μg/m³
PM2.5
8.48μg/m³
PM10
42.13ppb
O3
0.12ppb
SO2
3.51ppb
NO2
0.11ppm
CO
AQI 39
Good
2.50μg/m³
PM2.5
9.24μg/m³
PM10
41.90ppb
O3
0.12ppb
SO2
3.52ppb
NO2
0.11ppm
CO
AQI 40
Good
2.31μg/m³
PM2.5
7.15μg/m³
PM10
42.90ppb
O3
0.10ppb
SO2
3.48ppb
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 08:00:00 on 2026-02-12.
The best air quality in North Branford, Connecticut was recorded at 02:00:00 on 2026-02-12.
The real-time air quality index in North Branford, Connecticut is 37, currently categorized as Good.
The most common pollutant in North Branford, Connecticut is O3.
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 2.73 μg/m3.
The current PM10 levels in North Branford, Connecticut are 8.69 μg/m3.
The current carbon monoxide (CO) level in North Branford, Connecticut is 0.129 ppm.
The current sulfur dioxide (SO2) levels in North Branford, Connecticut are 0.139 ppb.
The current ozone (O3) levels at North Branford, Connecticut is 40.493 ppm.
The current nitrogen dioxide (NO2) levels at North Branford, Connecticut is 3.455 ppb.
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