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Nonprofit Explorer is a ProPublica database of annual returns filed by tax-exempt organizations, using IRS data released since 2013. It lets users search for organizations and people, view details such as executive compensation, revenue and expenses, and download tax filings going back to 2001. ProPublica also provides an API to the search engine and database powering the tool.
OpenAQ is a nonprofit environmental technology organization that provides open access to ground-level air quality data. It aggregates data from hundreds of sources worldwide and harmonizes them on an open-source platform. Users can access data through a REST API, an interactive map, and the OpenAQ Explorer web application. The platform provides physical measurements rather than aggregated values such as air quality indexes.
