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About the World Air Quality Index project
aqicn.org - waqi.info

The World Air Quality Index project is a non-profit project started in 2007. Its mission is to promote air pollution awareness for citizens and provide a unified and world-wide air quality information.

The project is providing transparent air quality information for more than 130 countries, covering more than 30,000 stations in 2000 major cities, via those two websites: aqicn.org and waqi.info.
The founding team, located in Beijing China, is composed of several contributors in the domain environmental sciences, system engineering, data science, as well as visual design. The team has been expanding worldwide, with new key supporters from Singapore, India, Australia, USA.

The project, despite its social intent and expensive outreach, has never received any public funding. The limited income, essentially from online ads, is used to cover the infrastructure and hardware cost. Engineering work is contributed.

The project is constantly looking for support from more contributors. It has now received active contributions from more than 16021 citizens from 137 countries:

made in 北京

Entrar em contato com a equipe do índice de qualidade de ar mundial

If you would like to send us a message, please try to use one of the following dedicated contact channels:

Measuring the Air Quality in your city
✳️ If you would like to measure the air quality using your own air quality monitoring station, check the air quality monitor page.
✳️ If you already have one ore more air quality stations, and would like it to publish it on our map, click to check the data feed page.
Historical & Real-time Data & API
✳️ If you need access to the worldwide historical air quality, click to data check the database platform page.
✳️ If you need access to the real-time air quality data, or the forecast data, click to check the API page.
Contributing or Promoting to the project
✳️ If your country or city is not covered on the map, and would like to setup a citizen network, click to check new country coverage page.
✳️ If you are from a media and want to use a screen shot of our sites (aqicn.org and waqi.info), no need to ask for permission .. just go ahead!
✳️ If you want to contribute and help promoting air quality awareness, check the contribute page.
If none of the above channels match your need, click here to send us a message (but, please, keep in mind that due to our limited team capacity we can not guarantee replying to all messages).


Credits


Todos os créditos devem ser dados às embaixadas na China por inicialmente fornecerem e publicarem suas medições de qualidade de ar de PM2,5, para o MPA da China pelo enorme esforço no fornecimento de PM2,5, para muitas cidades e todas as Agencias de Proteção Ambiental ao redor do mundo pelo seu excelente trabalho de monitoramento e fornecimento de informações sobre a qualidade do ar.

All this work is made possible thanks to the excellent work for the worldwide EPA (below list not exhaustive):

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We are looking for help to translate this website. More information, please check the translation page.

Common question & answers

  1. Air Quality Data sources: All the Air Quality data seen on World Air Quality Index are the official data from each country respective Environmental Protection Agency (EPA). Data from each EPAs is measured using professional monitoring equipment. The full EPA source list used in World Air Quality Index is available from sources page.
  2. Seeing different readings from other websites: This is most likely normal, and due to the fact that different websites use different AQI scales present the data. At World Air Quality Index, we are using the US EPA scale, while other website might use different scales. Check this article for more information.
  3. I want to monitor the air quality in my area: As high-end professional stations can be really expensive (more than $10K per stations), the World Air Quality Index project / Earth Sensing Labs has designed specialy optimized and affordable monitoring stations costing as low as $200. Please check the GAIA air quality monitoring station product page.
  4. I want to add a new station on the map: Provided your monitoring station is qualified (for instance if it is using BAM, TOEM or GAIA technology), then adding a new station on the map is not only simple and straightforward but also completely free. Please refer to this page for the full explanation
  5. Data quality & real-time validation: The data published on World Air Quality Index is real-time and therefore unvalidated at the time of publication. In order to strengthen the quality, a set of real-time AI algorithms are used to detect abnormal data conditions (sparks, low reporting, etc.) and automatically 'disable' data reported from defective stations.
  6. Historical data access: We are currently investigating with several international institutions (WHO, UN, GEO) the possibility to setup a framework for accessing the historical Air Quality data. If you are from an international institution, organization or university and want to join this effort, then check our data platform page.
  7. API (Application Programing interface): The World Air Quality Index project is offering a free API for maps, tiles and programatic JSON access. Check the API page for more information.
  8. Contributing to the World Air Quality Index project: The project is always looking for more hands to support the activities: For instance, to write articles, to improve our applications, to create new data visualization, to improve the air quality forecast or to translate the website and app to news languages. Check the contribute page for more info.
  9. Fundings: The World Air Quality Index project is independent from any governement and any "profit" corporation. It has so far not received any fundings from any public nor private entity. The limited income from online ads is used to cover infrastructure cost.
  10. Why chosing the U.S. EPA index to harmonize the data? This is mostly for historcal reason: When we started in 2007, there was not so many alternative, and the US EPA was actually quite proactive at promoting the idea of clean air, so the choice was natural. Some alternatives, such as the European “Common Air Quality Index” could also have been a good option, but the EEA failed to promote their standard. This won't be a problem for long anyways, since we are now working on a improvement which will allow users to select any scale they want among a list of more than 80 scales!
  11. How many cities do you currently provide air quality data for and is the info available on your app in each of them? We are providing the data for 9000 stations worldwide ~ that’s around 600 major cities in 70 countries. The info is available in the app for each of them, but not all of the cities have the “full” set of pollutant monitoring (e.g. PM2.5, PM10, Ozone, NO2, SO2, CO). For example, some only have PM10 or a composite AQI. We are also continuously increasing the coverage, targeting to get 10 to 20% more stations every year. The full list of cities and stations is available from this page.
  12. Media kit? Our public media kit is available from the media kit page.
Any other question, please check the Frequently Asked Question page.

made in 北京


Ranking de Qualidade do Ar

Sobre a medição da aualidade do ar e poluição

Sobre os níveis de qualidade do ar

- Valores do Índice de Qualidade do Ar (AQI)Níveis de preocupação de saúde
0 - 50 Boa 0-50: Boa - A qualidade do ar é considerada satisfatória, a poluição do ar representa pouco ou nenhum risco
51 -100 Moderado 50-100: Moderado - A qualidade do ar é aceitável; No entanto, para alguns poluentes pode haver um problema de saúde moderada para um número muito pequeno de pessoas que são mais sensíveis à poluição do ar.
101-150 Não Saudável para Grupos Sensíveis Membros de grupos sensíveis podem ter efeitos na a saúde. O público em geral não é susceptível de ser afetado.
151-200 Não saudável 150-200: Insalubre - Toda a população pode começar a sentir os efeitos na saúde; membros de grupos sensíveis podem apresentar efeitos mais sérios de saúde.
201-300 Muito Prejudical à Saúde 200-300: Muito Insalubre - As advertências de saúde de situações de emergência. Toda a população é mais susceptível de ser afectada.
300+ Perigoso 300+: Perigoso - alerta de saúde: todos podem experimentar efeitos mais graves para a saúde

Para saber mais sobre Qualidade do Ar e Poluição, verifique o wikipedia Qualidade do Ar tópico ou o guia AIRNow a Qualidade do Ar e sua saúde.

Para informações sobre saúde muito úteis em Pequim, procure Doutor Richard Saint Cyr MD, consulte www.myhealthbeijing.com blogue.


Aviso de uso: Todos os dados da Qualidade do Ar não são validados no momento da publicação e, devido à garantia de qualidade, esses dados podem ser alterados, sem aviso prévio, a qualquer momento. O projeto Índice de Qualidade do Ar Mundial exerceu todas as habilidades e cuidados razoáveis na compilação do conteúdo desta informação e sob nenhuma circunstância o A equipe do projeto World Air Quality Index ou seus agentes podem ser responsabilizados em contrato, responsabilidade civil ou de outra forma por qualquer perda, lesão ou dano decorrente direta ou indiretamente do fornecimento desses dados.



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