Air Quality Historical Data Platform
Institution & University Registration



Since the beginning, the World Air Quality Index (WAQI) project team has always been keen on providing a transparent Air Quality Information to the world citizens.

The WAQI project has also always been keen on providing historical Air Quality Data to relevant institutions and organizations working in the area of environmental awareness, air quality monitoring, as well as health and epidemiological studies. Here are few of our partners and colleagues to which we have been providing historical air quality data information:

United Framework

In order to make the historical Air Quality Data dissemination even more relevant, the World Air Quality Index team has been investigating with the most relevant international institutions the possibility to setup an open data framework. Here are fews of the institutions we have engaged:

  • WHO - World Health Organization
  • UNEP - United Nation Environmental Program
  • UNIDO - United Nation Industrial Development Organization
  • WMO - World Meteorological Organization
  • GEO - Group on Earth Observations
  • WRI - World Resource Institute
  • CCA - Climate & Clean Air Coalition
  • UNFCCC - United Nations Framework Convention on Climate Change

The open data framework objective is to provide unlimited and free access the world historical and real-time Air Quality data from the 100+ countries covered on Everyone - both institutions as well as citizens - agrees that this is not only a good idea, but that it should *just* happen.

Free Downloadable Database

Database Download
The daily average air quality data for all of the stations can be downloaded freely from the form below. Note that all the figures are converted to AQI using the US EPA standard: i.e. we do not publish the raw concentrations, but only the AQI.



If you want to download multiple stations at once, covering the COVID-19 period, go to the COVID-19 data page instead. You can find a ~28MB downloadable data-set covering more than 380 cities worldwide.

The Air Quality data is currently only available for the past 7 years, from 2014 until now. If you need data before this period, we recommend to either contact the originating EPA, or consider using estimates based on remote sensing data. You can for instance check the catalog from the AERIS/ICARE project, which is archiving satellite data since 2000.

In the above data, we publish the "Individual pollutant" Air Quality index. For instance, if you check the figures for PM2.5, they correspond to the PM2.5 individual AQI (noted as AQIPM2.5). If you want to calculate the overall AQI, aka composite AQI, you need to take the maximum of all individual AQI:

AQI = max( AQIPM2.5, AQIPM10, AQIO3, ...)

Last if you need the real-time data instead, try the API page. It's free too!

Inquiry & Registration

If the above data does not work for you, and you are from an international institution, organization or university you can register your interest with the form below. Note that this registration is only at intent level, for us to consolidate the list of all interested parties, and does not bound you, nor the world air quality index project, to any obligations.

Institution & University Registration - subscription form

Your information

Enter your name - eg "John Doe"
Enter your email address - eg ""
Enter your organization - eg "Harvard Business School"
Enter your position - eg "Student, Researcher, Head"

Data information

Data Period - eg "June 2018" to "August 2018"
Data Frequency
Data Units
Enter the name of the stations you need the data for - eg "Beijing"

Tell us a bit more

Write few words about your request - eg: "I would like to get the daily max AQI for Berlin for Winter 2014", "I would like to know the hourly concentration of SO2 for Civil Lines in Delhi on June 18th 2015", "I would like to support your project and give you hand", ..

Contributing or Supporting this Project

✋The World Air Quality project might look like one of those big projects coming from big organizations... but it is actually just a small, but lean, team behind it.

Despite its expensive outreach, the project has never received any financial support from any of NGO nor from any government🌸

The project income comes online advertising, but it is just enough to pay the cloud infrastructure. So, yes, all contributors are having a real job at the same time🙏

Yet, rather than asking for financial support, we prefer asking for contributors who can help with their time. Check the contribute page for more info.


If you do not have time to contribute, but still would like to help and support our project, what about getting one of our cool GAIA air quality monitoring station? ☀️💨👌


Data Credits

The open data framework would not be possible without the work from the worldwide EPA, which should get the credits for their monitoring programs.

À propos de la qualité de l'air et des mesures de la pollution atmosphérique :

À propos des niveaux de qualité de l'air

IQANiveau de pollution de l'air Impact sur la santé
0 - 50 Bon La qualité de l'air est jugée satisfaisante, et la pollution de l'air pose peu ou pas de risque.
51 -100 Modéré La qualité de l'air est acceptable. Cependant, pour certains polluants, il peut y avoir un risque sur la santé pour un très petit nombre de personnes inhabituellement sensibles à la pollution atmosphérique.
101-150 Mauvais pour les groupes sensibles La qualité de l'air est acceptable; Cependant, pour certains polluants, il peut y avoir un problème de santé modérée pour un très petit nombre de personnes qui sont particulièrement sensibles à la pollution de l'air.
151-200 Mauvais Tout le monde peut commencer à ressentir des effets sur la santé; les membres des groupes sensibles peuvent ressentir des effets de santé plus graves.
201-300 Très mauvais Avertissements de santé de conditions d'urgence. Toute la population est plus susceptible d'être affecté.
300+ Dangereux Alerte de santé: tout le monde peut ressentir des effets de santé plus graves.

Pour en savoir plus sur la qualité de l'air, consultez le sujet Qualité de l'air sur Wikipedia ou le guide AirNow de la qualité de l'air et de votre santé .

Pour des conseils de santé très utiles du Dr. Richard Saint Cyr, consultez le blog

Notice d'utilisation: Toutes les données sur la qualité de l'air ne sont pas validées au moment de la publication et, pour des raisons d'assurance de la qualité, ces données peuvent être modifiées à tout moment et sans préavis. Le projet Indice de la qualité de l'air dans le monde a exercé toutes les compétences et l'attention réalisables dans la compilation du contenu de ces informations. Indice de la qualité de l’air dans le monde , l’équipe de projet ou ses agents ne peuvent être tenus responsables, contractuellement, judiciairement ou autrement, de toute perte, blessure ou préjudice résultant directement ou indirectement de la fourniture de ces données.


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