Stay updated with real-time air quality in New Haven, 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)
27
Good
New Haven, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.94 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.48 μg/m³
0
55
155
255
425
605+
26.98 ppb
0
55
71
86
201
201+
0.67 ppb
0
36
76
186
605
1005+
4.95 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
New Haven, Connecticut
New Haven, Connecticut
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AQI 27
Good
4.92μg/m³
PM2.5
16.45μg/m³
PM10
26.86ppb
O3
0.67ppb
SO2
4.79ppb
NO2
0.30ppm
CO
AQI 27
Good
4.91μg/m³
PM2.5
16.02μg/m³
PM10
27.22ppb
O3
0.31ppb
SO2
5.19ppb
NO2
0.29ppm
CO
AQI 27
Good
4.96μg/m³
PM2.5
16.10μg/m³
PM10
26.64ppb
O3
0.31ppb
SO2
5.48ppb
NO2
0.29ppm
CO
AQI 27
Good
4.97μg/m³
PM2.5
18.22μg/m³
PM10
23.09ppb
O3
0.67ppb
SO2
4.77ppb
NO2
0.30ppm
CO
AQI 27
Good
4.91μg/m³
PM2.5
16.02μg/m³
PM10
27.22ppb
O3
0.31ppb
SO2
5.19ppb
NO2
0.29ppm
CO
AQI 27
Good
4.96μg/m³
PM2.5
16.10μg/m³
PM10
26.64ppb
O3
0.31ppb
SO2
5.48ppb
NO2
0.29ppm
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 New Haven, Connecticut is updated on an hourly basis.
The worst air quality in New Haven, Connecticut was recorded at 12:00:00 on 2025-07-14.
The best air quality in New Haven, Connecticut was recorded at 12:00:00 on 2025-07-14.
The real-time air quality index in New Haven, Connecticut is 27, currently categorized as Good.
The most common pollutant in New Haven, Connecticut is PM2.5.
If the air quality in New Haven, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in New Haven, Connecticut at present are 4.938 μg/m3.
The current PM10 levels in New Haven, Connecticut are 16.478 μg/m3.
The current carbon monoxide (CO) level in New Haven, Connecticut is 0.303 ppm.
The current sulfur dioxide (SO2) levels in New Haven, Connecticut are 0.666 ppb.
The current ozone (O3) levels at New Haven, Connecticut is 26.98 ppm.
The current nitrogen dioxide (NO2) levels at New Haven, Connecticut is 4.947 ppb.
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