This exhibition recounts the practices and the work undertaken in the nineteenth and twentieth centuries to supply the city with drinking water: wells and fountains, catchment sources, underground reservoirs, water towers, heritage felt as unsightly and hidden become industrial heritage and labeled, water factory... It tells the evolution of the discharge of wastewater into rivers; from sewers to the construction of the treatment plant…. It questions the accessibility to water, the profits from its exploitation, pollution, its power relationship with the development of activities and recreation and questions the way of living in harmony with it. It also tells the story of how much it took to transform our relationships with water, body and hygiene throughout the history of popular baths. A multidimensional story that the archives service offers you to discover.