Prof. Dr. Jörg E. Drewes is the Chair Professor of Urban Water Systems Engineering at the Technical University of Munich (TUM), Germany. Previously, he served as Full Professor of Civil and Environmental Engineering at the Colorado School of Mines, U.S.A. (2001-2013) and Director of Research for the National Science Foundation Engineering Research Center on Reinventing the Nation's Urban Water Infrastructure. Dr. Drewes has published more than 300 journalpapers, book contributions, and conference proceedings.Prof. Dr. Thomas Letzel is an analytical chemist with almost 20 years of professional experience in the field of analytical screening techniques using liquid and gas phase chromatography with mass spectrometric detection. Prof. Letzel is head of the Analytical Research Group at the Chair of Urban Water Systems Engineering at the Technical University of Munich (TUM), Germany. Dr. Letzel is author and co-author of more than 150 journal papers, book contributions, conference proceedings, and threebooks.