This project, funded by the National Science Foundation for 4 years, will demonstrate the approach at a 20-bed unit in Eaton Residential College at the University of Miami, Florida, USA. The unique low-energy treatment system under development will incorporate a biological trreatment, iron-mediated aeration/ ultrafiltration, and advanced oxidation with rainwater makeup, avoiding the use of high-energy membrane treatment. In two further research thrusts we are (a) studying social motivations for adoption of net-zero water technology, and (b) developing real-time risk detection technology using machine learning and evidence processing techniques.