1. Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, Nevada 89193-9954, United States
2. Hampton Roads Sanitation District, P.O. Box 5911, Virginia Beach, Virginia 23471-0911, United States
3. The Charles Edward Via, Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
4. Trussell Technologies, Inc., 380 Stevens Avenue, Suite 212, Solana Beach, California 92075, United States
5. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Dubendorf, Switzerland
6. School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland