The freshwater resources of the SUDOE region are under increasing anthropic pressure, leading to problems of scarcity and water quality, conflicts of use and risks to natural environments. In order to cope with the growing shortage of water resources, a paradigm shift is essential. The adaptation of practices and organisations through the definition of concerted and multi-annual management strategies will ensure access to water necessary for the life of ecosystems and the economic and social development of the territory. To address this challenge, TARGET project partners have identified a need and opportunity for cooperation to integrate unconventional waters into local water management. The objective is to promote, based on prospective analyses, the development and implementation of a territorial planning strategy for sustainable water management and the prevention of crisis situations arising from water scarcity. This strategy will allow the development of action plans that will integrate solutions for the use of unconventional water, including the reuse of treated waste water (Reut). The solutions, tested through demonstration projects, will seek to improve water governance, foster social acceptability, find innovative business models and address quality issues related to emerging pollutants. The project partners benefit from Spains experience in Reut, the EUs most reused country, Frances long experience in water governance and Portugals recent experience in water production meeting quality requirements for reuse. Shared experiences and views will enable synergies to be established to propose the most appropriate solutions for each region and thus a planning strategy for sustainable water management and the prevention of water scarcity useful for all. The TARGET project will thus increase the strategic and operational capacities of the actors involved in water management in the SUDOE territory.