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)
56
Moderate
Hartford, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.34 μg/m³
0
55
155
255
425
605+
21.34 ppb
0
55
71
86
201
201+
0.18 ppb
0
36
76
186
605
1005+
15.45 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hartford, Connecticut
Hartford, Connecticut
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AQI 62
Moderate
15.19μg/m³
PM2.5
25.95μg/m³
PM10
40.21ppb
O3
0.40ppb
SO2
4.90ppb
NO2
0.39ppm
CO
AQI 62
Moderate
15.00μg/m³
PM2.5
27.24μg/m³
PM10
38.42ppb
O3
0.41ppb
SO2
9.55ppb
NO2
0.39ppm
CO
AQI 62
Moderate
14.89μg/m³
PM2.5
28.34μg/m³
PM10
39.73ppb
O3
0.41ppb
SO2
8.20ppb
NO2
0.39ppm
CO
AQI 62
Moderate
15.12μg/m³
PM2.5
28.03μg/m³
PM10
38.63ppb
O3
0.39ppb
SO2
8.72ppb
NO2
0.39ppm
CO
AQI 62
Moderate
14.84μg/m³
PM2.5
29.08μg/m³
PM10
39.22ppb
O3
0.43ppb
SO2
9.97ppb
NO2
0.39ppm
CO
AQI 62
Moderate
15.16μg/m³
PM2.5
27.97μg/m³
PM10
39.65ppb
O3
0.39ppb
SO2
5.98ppb
NO2
0.39ppm
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 04:00:00 on 2025-07-29.
In the last 24 hrs, the best air quality in Hartford, Connecticut was observed at 01:00:00 on 2025-07-29.
The current air quality in Hartford, Connecticut is 62, categorized as Moderate 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 15.199 μg/m3.
The current PM10 concentration at Hartford, Connecticut is 25.061 μg/m3.
The current carbon monoxide (CO) concentration at Hartford, Connecticut is 0.399 ppm.
The current sulfur dioxide (SO2) concentration at Hartford, Connecticut is 0.406 ppb.
The current ozone (O3) concentration at Hartford, Connecticut is 37.083 ppm.
The current nitrogen dioxide (NO2) concentration at Hartford, Connecticut is 11.946 ppb.
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