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)
41
Good
North Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.80 μg/m³
0
55
155
255
425
605+
43.78 ppb
0
55
71
86
201
201+
0.30 ppb
0
36
76
186
605
1005+
7.93 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
North Branford, Connecticut
Scroll To Air Quality MapLoading...
AQI 42
Good
5.14μg/m³
PM2.5
13.81μg/m³
PM10
45.27ppb
O3
0.30ppb
SO2
9.81ppb
NO2
0.12ppm
CO
AQI 40
Good
5.53μg/m³
PM2.5
18.69μg/m³
PM10
42.99ppb
O3
0.30ppb
SO2
5.47ppb
NO2
0.14ppm
CO
AQI 41
Good
5.21μg/m³
PM2.5
13.32μg/m³
PM10
44.35ppb
O3
0.30ppb
SO2
11.09ppb
NO2
0.11ppm
CO
AQI 42
Good
5.27μg/m³
PM2.5
13.98μg/m³
PM10
44.88ppb
O3
0.30ppb
SO2
9.87ppb
NO2
0.12ppm
CO
AQI 42
Good
5.36μg/m³
PM2.5
14.09μg/m³
PM10
44.79ppb
O3
0.32ppb
SO2
9.61ppb
NO2
0.13ppm
CO
AQI 41
Good
5.21μg/m³
PM2.5
13.07μg/m³
PM10
44.09ppb
O3
0.30ppb
SO2
11.57ppb
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 02:00:00 on 2026-03-29.
The best air quality in North Branford, Connecticut was recorded at 03:00:00 on 2026-03-29.
The real-time air quality index in North Branford, Connecticut is 41, 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 5.549 μg/m3.
The current PM10 levels in North Branford, Connecticut are 15.8 μg/m3.
The current carbon monoxide (CO) level in North Branford, Connecticut is 0.14 ppm.
The current sulfur dioxide (SO2) levels in North Branford, Connecticut are 0.304 ppb.
The current ozone (O3) levels at North Branford, Connecticut is 43.779 ppm.
The current nitrogen dioxide (NO2) levels at North Branford, Connecticut is 7.927 ppb.
All Rights Reserved © Ambee Inc. 2025