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)
24
Good
North Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.20 μg/m³
0
55
155
255
425
605+
26.02 ppb
0
55
71
86
201
201+
0.13 ppb
0
36
76
186
605
1005+
4.24 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
North Branford, Connecticut
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AQI 23
Good
2.25μg/m³
PM2.5
5.60μg/m³
PM10
25.42ppb
O3
0.20ppb
SO2
7.87ppb
NO2
0.11ppm
CO
AQI 22
Good
2.43μg/m³
PM2.5
8.22μg/m³
PM10
23.61ppb
O3
0.21ppb
SO2
6.66ppb
NO2
0.13ppm
CO
AQI 23
Good
2.22μg/m³
PM2.5
5.24μg/m³
PM10
25.17ppb
O3
0.20ppb
SO2
8.37ppb
NO2
0.10ppm
CO
AQI 24
Good
2.28μg/m³
PM2.5
5.41μg/m³
PM10
25.57ppb
O3
0.20ppb
SO2
7.60ppb
NO2
0.11ppm
CO
AQI 24
Good
2.29μg/m³
PM2.5
5.63μg/m³
PM10
25.75ppb
O3
0.20ppb
SO2
7.28ppb
NO2
0.11ppm
CO
AQI 23
Good
2.21μg/m³
PM2.5
5.08μg/m³
PM10
25.04ppb
O3
0.20ppb
SO2
8.58ppb
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 03:00:00 on 2026-02-11.
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 24, 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 2.677 μg/m3.
The current PM10 levels in North Branford, Connecticut are 11.2 μg/m3.
The current carbon monoxide (CO) level in North Branford, Connecticut is 0.117 ppm.
The current sulfur dioxide (SO2) levels in North Branford, Connecticut are 0.134 ppb.
The current ozone (O3) levels at North Branford, Connecticut is 26.016 ppm.
The current nitrogen dioxide (NO2) levels at North Branford, Connecticut is 4.238 ppb.
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