Air quality information

How can I access historical data on the IQAir platform?

A guide to the freely available historical air quality data provided on the IQAir website and app

Written by Chloe
Updated over a week ago

Reported AQI levels seem lower than it appears, visually

Reported air quality levels are too low. Published data appears to be incorrect.

Written by Kelsey
Updated over a week ago

What is AQI?

Guide to understanding the Air Quality Index

Written by Chloe
Updated over a week ago

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

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？

Written by Chloe
Updated over a week ago

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

A

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)

Written by Chloe
Updated over a week ago

How is AQI calculated without all 6 key pollutants?

Written by Chloe
Updated over a week ago

How accurate is AirVisual’s air quality data?

A

Written by AirVisual
Updated over a week ago

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

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

Written by Chloe
Updated over a week ago

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

Written by Chloe
Updated over a week ago

My city's data is unavailable on the AirVisual map

Written by Chloe
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

A

Written by AirVisual
Updated over a week ago

What determines the major cities ranking?

Written by Chloe
Updated over a week ago

Air quality forecast

Written by Chloe
Updated over a week ago

What is AirVisual Earth and how does it work?

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?

Written by Chloe
Updated over a week ago

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

Written by Chloe
Updated over a week ago

Access AirVisual's AQI, Air quality and pollution API

Written by Chloe
Updated over a week ago

AirVisual API timestamp - how does it work?

Written by Chloe
Updated over a week ago

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

Written by Chloe
Updated over a week ago

Why are AirVisual and AirNow showing different AQI numbers?

Written by Chloe
Updated over a week ago

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

A

Written by AirVisual
Updated over a week ago

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

A

Written by AirVisual
Updated over a week ago

How accurate is AirVisual’s data in Vietnam?

A

Written by AirVisual
Updated over a week ago

In Vietnam, where does AirVisual get its data from?

A

Written by AirVisual
Updated over a week ago