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Air quality information

  • How can I access historical data on the IQAir platform?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Reported AQI levels seem lower than it appears, visually

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • How accurate is AirVisual’s data in Vietnam?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • In Vietnam, where does AirVisual get its data from?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • How accurate is AirVisual’s air quality data?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Where does AirVisual get its air quality data from?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • How is the Malaysian Air Pollution Index calculated?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Main pollutant thresholds for US and China Air Quality Indexes (AQI)

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Calculate AQI without all 6 pollutants?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • How can I check the data source of a station?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Why are AirVisual and AirNow showing different AQI numbers?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • AirVisual API timestamp - how does it work?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • What is AQI?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • 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?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

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

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • What determines the major cities ranking?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • My city's data is unavailable on the AirVisual map

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Access AirVisual's AQI, Air quality and pollution API

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • What is AirVisual Earth?

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • Air quality forecast

    <p class="no-margin">On the IQAir platform, all ground-based stations are attributed to a contributor and data source for data transparency and acknowle...

  • What figures do you use to get the AQI results

    What figures do you use to get the AQI results

  • What is AQI?

    What is AQI?

  • What is considered good air quality?

    What is considered good air quality?

  • Why does your AQI differ from other sites?

    Why does your AQI differ from other sites?

  • Why was my air quality bad yesterday and today its good?

    Why was my air quality bad yesterday and today its good?

  • How can I prevent bad air quality?

    How can I prevent bad air quality?

  • Can I go out side when its moderate air quality?

    Can I go out side when its moderate air quality?

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

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

  • What is 2.5 PM?

    What is 2.5 PM?

  • Where can I locate my AQI with out going to the website?

    Where can I locate my AQI with out going to the website?

  • Where can I find out how dirty my air is where I live?

    Where can I find out how dirty my air is where I live?

  • Where is the display screen for the AirVisual Outdoor?

    Where is the display screen for the AirVisual Outdoor?

  • How is historical data stored?

    How is historical data stored?

  • Does the monitor need to connect to the cloud or could it be an in house server?

    Does the monitor need to connect to the cloud or could it be an in house server?

  • How far back does the data go?

    How far back does the data go?

  • How do you receive alerts through the AirVisual app?

    How do you receive alerts through the AirVisual app?

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

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

  • AirVisual Outdoor specifications state that it monitors PM1 but we do not display it. Where can it be found?

    AirVisual Outdoor specifications state that it monitors PM1 but we do not display it. Where can it be found?

  • AirVisual Outdoor sensors modules should be replaced how often?

    AirVisual Outdoor sensors modules should be replaced how often?

  • What is the price of the Dongle Modem Stick?

    What is the price of the Dongle Modem Stick?

  • What power is used for the AirVisual Outdoor?

    What power is used for the AirVisual Outdoor?

  • What is the differences between AirVisual Outdoor and Purpleair?

    What is the differences between AirVisual Outdoor and Purpleair?

  • What is the length of the AirVisual power cords?

    What is the length of the AirVisual power cords?

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

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

  • Why is your air quality index different from other sites?

    Why is your air quality index different from other sites?

  • What is the differences between PurpleAir and Clarity data and our data?

    Quality assurance validation testing is performed on data generated from PurpleAir and Clarity sensors before the is data published on AirVisual.

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

    No. We don’t calibrate for government sensors, because these devices are regulated by air quality management districts and the EPA.

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

    AirNow averages the previous 3 to 12 hours of data and a weight factor to determine the "NowCast AQI."

  • How to download the raw data from your IQAir device/sensor?

    By logging on to iqair.com and using the web dashboard, raw data for your device can be gathered from the “download data” or API part of the device dashboa

  • Comparison of PM2.5 Measurements Using the Air Visual (AV) Sensor and Beta Attenuation Monitor (BAM)

    Measurements collected using a continuous light scattering sensor, AV, were compared to the measurements made using reference BAM data, computed by the US

  • Which LCS are supported to publishing data to the AirVisual Platform?

    Which LCS are supported to publishing data to the AirVisual Platform, why we support those LCSs, and which brands we will be supporting in the near future

  • Character Limit on Station Name in AirVisual

    When selecting your station name on the AirVisual Dashboard or the app, please ensure that the station name is limited to 20 characters including spaces t

  • Who owns the data produced from my purchased AirVisual Pro and/or AirVisual Outdoor monitors?

    As a device owner, any data generated from your device is owned by you. By publishing the sensor on the IQAir AirVisual Platform, you allow IQAir to licens

  • Cost for Historical Data

    For pulling historical data at customers request, IQAir charges are as follows: US$1 per 500 raw data points (e.g. hourly readings from a single station)

  • Outdoor low cost sensor Comparison Chart

    Outdoor low cost sensor Comparison Chart