Stay updated with real-time air quality in Hartford, 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)
52
Moderate
Hartford, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.94 μg/m³
0
55
155
255
425
605+
39.13 ppb
0
55
71
86
201
201+
0.15 ppb
0
36
76
186
605
1005+
19.16 ppb
0
54
101
361
1250
2050+
0.50 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hartford, Connecticut
Hartford, Connecticut
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AQI 44
Good
8.00μg/m³
PM2.5
14.18μg/m³
PM10
34.31ppb
O3
0.44ppb
SO2
5.84ppb
NO2
0.28ppm
CO
AQI 38
Good
7.44μg/m³
PM2.5
13.95μg/m³
PM10
32.95ppb
O3
0.44ppb
SO2
9.04ppb
NO2
0.29ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
14.79μg/m³
PM10
33.59ppb
O3
0.43ppb
SO2
7.94ppb
NO2
0.28ppm
CO
AQI 38
Good
7.50μg/m³
PM2.5
13.99μg/m³
PM10
33.20ppb
O3
0.44ppb
SO2
8.40ppb
NO2
0.29ppm
CO
AQI 44
Good
7.66μg/m³
PM2.5
15.09μg/m³
PM10
33.42ppb
O3
0.42ppb
SO2
8.64ppb
NO2
0.28ppm
CO
AQI 44
Good
7.73μg/m³
PM2.5
14.21μg/m³
PM10
33.95ppb
O3
0.45ppb
SO2
6.67ppb
NO2
0.28ppm
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 Hartford, Connecticut is updated every hour.
The worst air quality in Hartford, Connecticut in the last 24 hours was observed at 05:00:00 on 2025-07-10.
In the last 24 hrs, the best air quality in Hartford, Connecticut was observed at 05:00:00 on 2025-07-09.
The current air quality in Hartford, Connecticut is 49, categorized as Good based on real-time data.
The most common pollutant in Hartford, Connecticut is PM2.5.
If the air quality in Hartford, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Hartford, Connecticut is 8.917 μg/m3.
The current PM10 concentration at Hartford, Connecticut is 16.022 μg/m3.
The current carbon monoxide (CO) concentration at Hartford, Connecticut is 0.299 ppm.
The current sulfur dioxide (SO2) concentration at Hartford, Connecticut is 1.032 ppb.
The current ozone (O3) concentration at Hartford, Connecticut is 35.497 ppm.
The current nitrogen dioxide (NO2) concentration at Hartford, Connecticut is 7.463 ppb.
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