1. Swiss Federal Institute of Aquatic Science and Technology (Eawag), Überlandstr. 133, CH-8600, Dübendorf, Switzerland
2. Zürich Water Supply (WVZ), Hardhof 9, P.O. Box 1179, CH-8021, Zürich, Switzerland
3. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, CH-8092, Zürich, Switzerland