Stay updated with real-time air quality in Bristol, 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)
38
Good
Bristol, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.37 μg/m³
0
55
155
255
425
605+
27.34 ppb
0
55
71
86
201
201+
0.21 ppb
0
36
76
186
605
1005+
12.72 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Bristol, Connecticut
Bristol, Connecticut
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AQI 60
Moderate
13.65μg/m³
PM2.5
46.30μg/m³
PM10
2.26ppb
O3
0.36ppb
SO2
25.17ppb
NO2
0.34ppm
CO
AQI 54
Moderate
10.84μg/m³
PM2.5
17.86μg/m³
PM10
4.55ppb
O3
0.36ppb
SO2
18.02ppb
NO2
0.31ppm
CO
AQI 56
Moderate
12.06μg/m³
PM2.5
47.43μg/m³
PM10
5.04ppb
O3
0.36ppb
SO2
16.29ppb
NO2
0.31ppm
CO
AQI 62
Moderate
14.66μg/m³
PM2.5
30.06μg/m³
PM10
2.27ppb
O3
0.37ppb
SO2
25.93ppb
NO2
0.32ppm
CO
AQI 60
Moderate
14.14μg/m³
PM2.5
29.95μg/m³
PM10
2.21ppb
O3
0.37ppb
SO2
26.06ppb
NO2
0.38ppm
CO
AQI 58
Moderate
13.11μg/m³
PM2.5
49.29μg/m³
PM10
2.96ppb
O3
0.35ppb
SO2
17.58ppb
NO2
0.37ppm
CO
Air quality data and pollutant measurements for Connecticut, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Bristol, Connecticut is updated every hour.
The worst air quality in Bristol, Connecticut in the last 24 hours was observed at 08:00:00 on 2025-11-03.
In the last 24 hrs, the best air quality in Bristol, Connecticut was observed at 04:00:00 on 2025-11-02.
The current air quality in Bristol, Connecticut is 60, categorized as Moderate based on real-time data.
The most common pollutant in Bristol, Connecticut is PM2.5.
If the air quality in Bristol, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Bristol, Connecticut is 13.511 μg/m3.
The current PM10 concentration at Bristol, Connecticut is 46.16 μg/m3.
The current carbon monoxide (CO) concentration at Bristol, Connecticut is 0.32 ppm.
The current sulfur dioxide (SO2) concentration at Bristol, Connecticut is 0.359 ppb.
The current ozone (O3) concentration at Bristol, Connecticut is 2.264 ppm.
The current nitrogen dioxide (NO2) concentration at Bristol, Connecticut is 20.704 ppb.
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