Air quality information

Learn about AQI, our data sources, and how we validate and visualize air quality data

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27 articles in this collection
Written by AirVisual and Chloe

Why do Vietnamese government stations sometimes disappear from AirVisual’s map?

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Written by AirVisual
Updated over a week ago

How are Hanoi’s AQI and the city rankings calculated?

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Written by AirVisual
Updated over a week ago

How accurate is AirVisual’s data in Vietnam?

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Written by AirVisual
Updated over a week ago

In Vietnam, where does AirVisual get its data from?

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Written by AirVisual
Updated over a week ago

Why do Vietnamese government stations sometimes disappear from AirVisual’s map?

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Written by AirVisual
Updated over a week ago

How are Hanoi’s air quality (AQI) and the major city rankings calculated?

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Written by AirVisual
Updated over a week ago

Where does AirVisual get its air quality data from?

Learn which data sources AirVisual reports from to provide global air quality information
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Written by AirVisual
Updated over a week ago

How accurate is AirVisual’s air quality data?

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Written by AirVisual
Updated over a week ago

What is the difference between Singapore’s Pollutant Standards Index and the U.S. Air Quality Index?

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Written by AirVisual
Updated over a week ago

How is the Malaysian Air Pollution Index calculated?

Learn what is the difference between Malaysia's "API" and other air quality indexes (AQIs)
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Written by Chloe
Updated over a week ago

What is the difference between the US AQI and WHO air quality guidelines?

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Written by Chloe
Updated over a week ago

How can I access air pollution data through AirVisual's air quality API?

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Written by Chloe
Updated over a week ago

What is an air quality widget and how can I use one to display air quality information on my webpage?

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Written by Chloe
Updated over a week ago

How is AQI calculated without all 6 key pollutants?

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Written by Chloe
Updated over a week ago

Why are AirVisual and AirNow showing different AQI numbers?

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Written by Chloe
Updated over a week ago

How is air quality data validated before publishing on the AirVisual platform?

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Written by Chloe
Updated over a week ago

AirVisual API timestamp - how does it work?

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Written by Chloe
Updated over a week ago

How can I check the data source of a station?

Learn which different data sources AirVisual uses to report air quality for cities and stations, and how to identify them
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Written by Chloe
Updated over a week ago

What is AQI?

Guide to understanding the Air Quality Index
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Written by Chloe
Updated over a week ago

What does the asterisk (*) mean on some locations' AQI?

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Written by Chloe
Updated over a week ago

AirVisual’s outdoor data seems to differ from other sources. Why is this?

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Written by Chloe
Updated over a week ago

What is the difference between China & US AQI; 美国空气质量指数和中国空气质量指数有什么区别?

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Written by Chloe
Updated over a week ago

What determines the major cities ranking?

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Written by Chloe
Updated over a week ago

My city's data is unavailable on the AirVisual map

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Written by Chloe
Updated over a week ago

Access AirVisual's AQI, Air quality and pollution API

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Written by Chloe
Updated over a week ago

What is AirVisual Earth and how does it work?

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Written by Chloe
Updated over a week ago

Air quality forecast

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Written by Chloe
Updated over a week ago