In Africa 320 million people still do not have access to drinkable water that meets the basic hygiene standards. The filtering of used water is an issue as well since 80% of it is simply rejected into the wild and pollutes the environment. Veolia Water Technologies (VWT), a subsidiary company of the French multinational and present in 77 countries, specializes in the services and the filtering of the water. Its new Director for Development in Africa, Sébastien Gary describes for us the many challenges that await VWT in this part of the world.