The New Water Culture (NWC) is the one that allows a sustainable management system of the aquatic ecosystems. The objective of the NWC is the improvement of the quality and the conservation of the ecosystems, which means an improvement of the quality of the drinkable water and the guarantee of the water supply. As well as technical measures, the NWC implies the change of the citizens and politicians´ mentality. Without this cultural change the decrease of the consumption won´t be successful. The transparency in the information is basic.