Lasting four years, the project demonstrates the efficacy and efficiency of planning and technology tools for a circular economy, and an integrated and symbiotic use of water in four different sites, of which two are water utility-driven (Puglia region, Italy, and Almendralejo, Spain), and two business-driven (an inland, salt water aquaculture facility in Eilat, Israel, and Omis, Croatia). While demonstrating technologies and platforms, the project interfaces water resource and spatial planning and fosters social innovation for achieving co-creation and public ownership of the innovative approaches and technologies proposed.