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)
25
Good
North Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.18 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.82 μg/m³
0
55
155
255
425
605+
27.13 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
6.70 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 33
Good
5.82μg/m³
PM2.5
16.56μg/m³
PM10
26.32ppb
O3
0.50ppb
SO2
4.10ppb
NO2
0.21ppm
CO
AQI 38
Good
6.57μg/m³
PM2.5
15.81μg/m³
PM10
29.07ppb
O3
0.49ppb
SO2
4.13ppb
NO2
0.23ppm
CO
AQI 33
Good
5.82μg/m³
PM2.5
16.56μg/m³
PM10
26.32ppb
O3
0.50ppb
SO2
4.10ppb
NO2
0.21ppm
CO
AQI 33
Good
5.74μg/m³
PM2.5
15.94μg/m³
PM10
24.06ppb
O3
0.50ppb
SO2
4.25ppb
NO2
0.21ppm
CO
AQI 33
Good
5.74μg/m³
PM2.5
15.94μg/m³
PM10
24.06ppb
O3
0.50ppb
SO2
4.25ppb
NO2
0.21ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
15.95μg/m³
PM10
24.14ppb
O3
0.52ppb
SO2
4.02ppb
NO2
0.24ppm
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 06:00:00 on 2026-08-14.
The best air quality in North Branford, Connecticut was recorded at 04:00:00 on 2026-08-14.
The real-time air quality index in North Branford, Connecticut is 25, 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 4.176 μg/m3.
The current PM10 levels in North Branford, Connecticut are 15.817 μg/m3.
The current carbon monoxide (CO) level in North Branford, Connecticut is 0.194 ppm.
The current sulfur dioxide (SO2) levels in North Branford, Connecticut are 0.193 ppb.
The current ozone (O3) levels at North Branford, Connecticut is 27.13 ppm.
The current nitrogen dioxide (NO2) levels at North Branford, Connecticut is 6.704 ppb.
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