OpenAQ aggregates and harmonizes open air quality data across the globe so that air quality change-makers have unfettered access to the data they need to analyze, communicate and advocate for clean air. By providing universal access to data, OpenAQ aids in the fight against air inequality–the unequal access to clean air. The OpenAQ Platform aggregates disparate data sources, makes data freely available, keeps underlying data-fetching software fully open, and harmonizes the data into interoperable formats so that it's directly comparable and easier to analyze. The OpenAQ Platform is used for air quality, health and climate change research and analysis; air quality forecasting; journalism; policy advocacy; and more. By filling a basic data-access gap, we empower a wide variety of individuals, organizations and sectors across the globe to apply data in pursuit of a clean air future.


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We host real-time air quality data on a free and open data platform because people do amazing things with it. Find us at