1 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
2 Laboratory of Environmental Chemistry, School of Architecture, Civil, and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
3 Department of Civil & Environmental Engineering, University of California, Davis, Davis, California, USA.
4 Department of Civil and Environmental Engineering, Stanford University, Stanford, California, USA.
5 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland tim.julian@eawag.ch.
6 Swiss Tropical and Public Health Institute, Basel, Switzerland.