1. KWR Watercycle Institute
2. Nieuwegein
3. The Netherlands
4. Copernicus Institute
5. Utrecht University
6. Environmental Technology
7. Wageningen University
8. Technical University Delft
9. Delft
10. IVL Swedish Environmental Research Institute
11. Gothenburg
12. Sweden
13. National Institute for Public Health and the Environment/RIVM
14. Bilthoven