1. Energy and Resources Group, University of California, Berkeley, California 94720, United States
2. National Science Foundation Engineering Research Center for Re-inventing the Nation’s Urban Water Infrastructure, Stanford, California 94305, United States
3. Department of Civil & Environmental Engineering, University of California, Berkeley, California 94720, United States
4. Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
5. CIRCLE─Centre for Innovation Research, Lund University, 221 00 Lund, Sweden
6. The Water Research Foundation, 1199 North Fairfax Street, Suite 900, Alexandria, Virginia 22314, United States