The former water treatment plant of Saint-Maur-des-Fossés, located at 5 Avenue de l’Observatoire, is no longer in operation. The industrial site is permanently closed to the public, except for occasional special openings, such as during the L’Usine fait le mur street art festival or themed guided tours.
A redevelopment project is underway, aiming to transform the former industrial site into an open cultural and community space by 2027, featuring a fablab, a garden and artists' residencies.