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How air quality data contributors and sources are credited on the IQAir website and app?

IQAir is able to provide the world's largest database of global air...

Why are some data contributors "anonymous"?

On the IQAir platform, all ground-based stations are attributed to ...

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

The AirVisual platform aims to centralise and aggregate as much air...

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

Whilst the world's coverage of ground-based air monitoring stations...

How can I make my outdoor AirVisual device's data public?

1. Choose your location Our AirVisual Outdoor is designed to perfo...

How to remove or move a location/station in the AirVisual app?

To delete a location/station, Find the 'cog' settings icon on "My...

Why does the wind on the map go into the earth?

Air quality is not only affected by air pollution, but meteorology ...

Cannot register my monitor's serial number

If you receive an error message when trying to enter your serial nu...

My AirVisual Pro shows 'No recent data' for Outdoor air quality

If your AirVisual Pro's Indoor/Outdoor comparison screen stops disp...

How does the Live Major Cities Ranking work?

How does the Live Major Cities Ranking work?

What are the photos on station screen and how do I make use of it?

IQAir values every contributor and aims to provide our users with t...

The CO2 levels are high in my bedroom during the night, what should I do?

The best is to measure your bedroom and your children's bedroom to ...

Why do I need an air monitor when my air purifier already has a PM2.5 sensor inside?

Some air purifiers may contain a PM2.5 sensor, with the purpose of ...

Download the AirVisual Pro's data using Samba

Start by connecting the AirVisual Pro to a Wi-Fi Network. Connect y...

Export historical data from your AirVisual Pro using a mobile phone

To access the historical data that is stored within your AirVisual ...

Can I move my AirVisual device to a different organisation?

Once a new device has purchased, register the device using the AirV...

Does IQAir calibrate/adjust government sensors on the IQAir platform?

No. We don't calibrate for government sensors, because these device...

Why are the WHO Air Quality Guidelines used when different countries have different ambient air quality requirement?

The WHO air quality guidelines (AQGs) are intended for worldwide us...

Air quality forecast disclaimer

This forecasting model, and all resulting air quality predictions, ...

How can I reset my AirVisual Pro?

You have 3 ways to reset your AirVisual Pro: 1)A soft reset that w...

Battery stays at 0% when charging and turns off when unplugged

If an AirVisual Pro is kept disconnected from power for an extended...

Is missing data from stations common? How is the missing data treated in this ranking and which countries have bad data quality?

It is not uncommon for hourly measurements to be missing from sourc...

Why is your air quality index different from other sites?

Our AQI is calculated hourly and updated hourly. Many other website...

Where can I see when a location's data last updated?

Every location has a clear indication of its last update time provi...

AHAM & CADR (FAQ#14)

AHAM & CADR (FAQ#14) AHAM testing is generally flawed. It calls its...

Outdoor low cost sensor Comparison Chart

[https://iqairna-prod.crm.dynamics.com/api/data/v9.0/msdyn_knowledg...

Why are AirVisual and AirNow showing different AQI numbers?

1. Calculation: AirVisual and Airnow calculate PM 2.5 AQI in differ...

6가지 오염 물질 없이 AQI를 계산하시겠습니까?

AQI 수준이 가장 높은 오염 물질 또는 '건강 위험'은 "주요 오염 물질"로 간주되며 해당 오염 물질의 AQI는 포함된...

Does the AVO signal a user when to replace the module? If so how?

The numbers will be significantly off and would be an indicator tha...

Can the Pro's screen be switched off permanently, while still taking measurements?

Yes, you have the option to disable the screen indefinitely on your...

Will AirVisual Outdoor sensors communicate effectively if the location is made of concrete or cinderblock?

Yes, the communication of our sensors are based on it's internet co...

What are some of the major sources or causes of ambient air pollution?

Industries, households, cars, and trucks emit complex mixtures of a...

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

In Singapore, the National Environment Agency uses the Pollutant St...

What is AirVisual Earth?

AirVisual Earth is the first and only real-time, 3D pollution map a...

AirVisual Pro API returned JSON format

To access your monitor's data using your AirVisual Pro's Device API...

AirVisual Outdoor sensors modules should be replaced how often?

AirVisual Outdoor sensors modules should be replaced how often?

Chinese users: AirVisual Pro

免费服务热线:400-108-5117 1. 如何连接Wi-Fi 使用APP连接: 打开AirVisual app-点击左上角"+...

Is it normal that my humidifier is contributing to a high AQI?

A high indoor AQI should always be of genuine concern. If you notic...

Why does the AirVisual Pro monitor PM2.5 and CO2?

The AirVisual Pro, with it's large screen display, was designed to ...

What is the difference between IQAir and AirNow air quality readings?

AirNow averages the previous 3 to 12 hours of data and a weight fac...

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

The Vietnamese government websites frequently report air quality da...

What area coverage are the AirVisual Pro's measurements valid for?

For indoor monitoring, the coverage of an AirVisual Pro is a room (...

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

In order to offer the most value possible through our ever-growing ...

How do I display PM2.5 AQI and CO2 on the same screen?

The AirVisual Pro's PM2.5 and CO2 measurements are displayed side b...

Why is my AQI different in the AirVisual app between 2 phones?

You may notice a difference of AQI between 2 phones using the same ...

My iOS widget doesn't display data

If your iOS widget doesn't display data, most likely you need to ac...

My serial number does not exist

If you're trying to add your Pro's serial number in the app or in t...

Download or export your AirVisual device's data

Export data on IQAir Dashboard * OUTDOOR PUBLIC DEVICE If you h...

How is the Malaysian Air Pollution Index calculated?

The Malaysian Air Pollution Index (API) and the US Air Quality Inde...

AirVisual API timestamp - how does it work?

Understanding the API timestamp is important for accurately represe...

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