Plume Air Report is the world’s first air map. Its mission is to compile the levels of pollution, gases and suspended particles of some major cities in 40 countries around the world.
Plume Air Report collects public data from measurements made by the cities themselves, which can be found publicly. If at any time they cannot obtain such data, the application uses an algorithm to calculate it theoretically. It also works productively, so you can have recommendations hours before.
You can check the data through its website or with its app for Android or iPhone.