1. Eawag (Swiss Federal Institute of Aquatic Science & Technology), Sandec (Department of Water & Sanitation in Developing Countries), P.O. Box 611, CH-8600 Dübendorf, Switzerland
2. Office National de l'Assainissement du Sénégal, Cité TP SOM, No. 4, Hann, BP 13428, Dakar, Sénégal
3. Office National de l'Eau et de l'Assainissement, 01 BP 170 Ouagadougou 01, Burkina Faso