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Live air quality index in Hartford, Connecticut today

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

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Hartford, Connecticut

Last updated: ... (Local time)

Major air pollutants in Hartford, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter2.5 (PM2.5)

9.72 μg/m³

0

12.1

35.5

55.5

250.5

500.5+

Particulate Matter10 (PM10)

18.94 μg/m³

0

55

155

255

425

605+

Ozone (O3)

39.13 ppb

0

55

71

86

201

201+

Sulfur Dioxide (SO2)

0.15 ppb

0

36

76

186

605

1005+

Nitrogen Dioxide (NO2)

19.16 ppb

0

54

101

361

1250

2050+

Carbon Monoxide (CO)

0.50 ppm

0

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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Hartford, Connecticut

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Hartford, Connecticut air quality map: Track AQI near you




How accurate is Connecticut, USA air quality data?

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.


Frequently asked questions

How often is the air quality data for Hartford, Connecticut updated?

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The air quality for Hartford, Connecticut is updated every hour.


When was the worst air quality at Hartford, Connecticut in the last 24 hrs?

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The worst air quality in Hartford, Connecticut in the last 24 hours was observed at 05:00:00 on 2025-07-10.


When was the best air quality at Hartford, Connecticut in the last 24 hrs?

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In the last 24 hrs, the best air quality in Hartford, Connecticut was observed at 05:00:00 on 2025-07-09.


What is the current air quality in Hartford, Connecticut?

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The current air quality in Hartford, Connecticut is 49, categorized as Good based on real-time data.


What pollutant is the most common in Hartford, Connecticut?

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The most common pollutant in Hartford, Connecticut is PM2.5.


What should I do if the air quality in Hartford, Connecticut is poor?

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If the air quality in Hartford, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.


What is the current concentration of PM2.5 in Hartford, Connecticut?

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The current PM2.5 concentration at Hartford, Connecticut is 8.917 μg/m3.


What is the current concentration of PM10 in Hartford, Connecticut?

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The current PM10 concentration at Hartford, Connecticut is 16.022 μg/m3.


What is the current concentration of carbon monoxide (CO) in Hartford, Connecticut?

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The current carbon monoxide (CO) concentration at Hartford, Connecticut is 0.299 ppm.


What is the current concentration of sulfur dioxide (SO2) in Hartford, Connecticut?

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The current sulfur dioxide (SO2) concentration at Hartford, Connecticut is 1.032 ppb.


What is the current concentration of ozone (O3) in Hartford, Connecticut?

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The current ozone (O3) concentration at Hartford, Connecticut is 35.497 ppm.


What is the current concentration of nitrogen dioxide (NO2) in Hartford, Connecticut?

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The current nitrogen dioxide (NO2) concentration at Hartford, Connecticut is 7.463 ppb.


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