Stay updated with real-time air quality in 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)
20
Good
Branford, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
4.04 μg/m³
0
55
155
255
425
605+
22.29 ppb
0
55
71
86
201
201+
0.20 ppb
0
36
76
186
605
1005+
3.62 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Branford, Connecticut
Branford, Connecticut
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AQI 17
Good
2.41μg/m³
PM2.5
4.05μg/m³
PM10
18.22ppb
O3
0.21ppb
SO2
2.49ppb
NO2
0.20ppm
CO
AQI 21
Good
2.55μg/m³
PM2.5
3.86μg/m³
PM10
23.00ppb
O3
0.24ppb
SO2
2.65ppb
NO2
0.17ppm
CO
AQI 17
Good
2.40μg/m³
PM2.5
4.02μg/m³
PM10
18.09ppb
O3
0.20ppb
SO2
2.49ppb
NO2
0.20ppm
CO
AQI 19
Good
2.45μg/m³
PM2.5
7.12μg/m³
PM10
20.58ppb
O3
0.26ppb
SO2
2.66ppb
NO2
0.17ppm
CO
AQI 18
Good
2.42μg/m³
PM2.5
4.14μg/m³
PM10
18.63ppb
O3
0.22ppb
SO2
2.43ppb
NO2
0.20ppm
CO
AQI 18
Good
2.44μg/m³
PM2.5
4.00μg/m³
PM10
18.50ppb
O3
0.22ppb
SO2
2.53ppb
NO2
0.19ppm
CO
The air quality data for Connecticut, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Branford, Connecticut are available every hour.
Branford, Connecticut experienced its worst air quality at 03:00:00, 2025-11-15.
The best air quality in Branford, Connecticut was observed at 02:00:00 on 2025-11-14.
The air quality in Branford, Connecticut right now is Good, with an AQI of 17.
In Branford, Connecticut, NO2 is the most frequently found pollutant.
When air quality in Branford, Connecticut is compromised, staying indoors and wearing a mask can reduce health risks.
Branford, Connecticut currently has a PM2.5 concentration of 3.436 μg/m3.
Branford, Connecticut currently has a PM10 concentration of 10.922 μg/m3.
The current carbon monoxide (CO) level in Branford, Connecticut is 0.203 ppm.
The current sulfur dioxide (SO2) concentration in Branford, Connecticut is 0.317 ppb.
Branford, Connecticut currently has an ozone (O3) concentration of 11.317 ppm.
The current level of nitrogen dioxide (NO2) in Branford, Connecticut is 18.044 ppb.
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