The main ambition of HYDROUSA is to develop a new circular business model, which will be mostly suitable for Mediterranean and other water-scarce regions in Europe and worldwide. HYDROUSA aims to provide innovative solutions for decentralized water scarce areas in terms of water/wastewater treatment and management, which will close the water loops and will also boost their agricultural and energy profile. HYDROUSA goes beyond the current water and wastewater management practices by adopting innovative, nature-based and nature-inspired water management solutions for different types of water characterised by low energy footprint.