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The water and sanitation services facing sustainability issues in France, Wallonia, the Netherlands, Italy, Germany, the England, Spain, Greece and some Eastern European countries... This is the main topic of the documents you will find below. Here we are publishing the presentations made by our guest speakers during the ATHENS Week 2012 - with their permission.Monday19-11-12 : France, Wallonia and the NetherlandsJean-Luc TRANCART, Consultant and Professor of Water policies and technologies at the ENPC: Water and sanitation services. Position of the European Union. Glossary and definitions.Bernard BARRAQUE, Research Director at the French CNRS and professor at the ENGREF-AgroParisTech: Past and future Sustainability of Water Policies in Europe. Presentation of the European Directives concerning WaterCédric PREVEDELLO, Scientific consultant at AquaWal, the Union of the water cycle professionals of Wallonia: Water Services in Wallonia: Sustainability IssuesErik MOSTERT, Professor of Water resources management at the Delft University of Technology: Water and sanitation services in the NetherlandsStefan KUKS, Professor of Innovation and Water Policy Implementation at the University of Twente and chairman of the Regional Public Water Authority Regge en Dinkel: European Water and Sustainable Development of Sanitation Services in the NetherlandsTuesday 20-11-12 : Italy and GermanyAndrea MANGANO, former Director of International Operations for ACEA SpA Rome: Water Services in Italy: Scale economies and sustainabilityAndrea LIPPI, Professor of Policy analysis and Evaluation at the Faculty of Political Science Cesare Alfieri, University of Florence: The governance of water policy in Italy. Legal framework, processes and outcomesHelmut Herdt, Managing Director, Städische Werke Magdeburg Gmbh: Technical and economical challenges facing water utilities amidst demographical changesJens Libbe from the German Institute of Urban Affairs (DIFU-Berlin): GermanyWednesday 21-11-12 : EnglandThomas Zabel, independent Environmental Consultant, formerly Water Research and Consultancy: Water Services Provisions in the UKThursday 22-11-12 : Spain, Poland, Romania and GreecePere VERGER, Head of Projects Production for AGBAR: Management experience of AGBAR Water Part 1 and Part 2David SAURI, Professor at the Geography Department and Institute of Environmental Science and Technology at the Universitat Autònoma de Barcelona: Urban water services in SpainJean-Patrice POIRIER, independant consultan, former Europe Development Director  for Veolia Environnement: Water Operations in Eastern EuropeSerge Bosca, Director of Saur Neptun Gdansk S.A: The experiences of Saur Group in PolandDionysis Assimacopoulos, Professor and coordinator of the Environmental and Energy Management Research Unit at the National Technical University of Athens: Water and sanitation services in Greece and the sustainability challengesFriday 23-11-12 : Sanitation service in the Parisian Region and overall summary of the weekJean-Pierre Tabuchi, Health and Environment Department at the SIAAP: Water Management in Paris Area.Toward sustainable developmentAntonio MASSARUTTO, Professor at the Department of Economics, University of Udine, and Bocconi University, Milano: Trends in European water management. Liberalization, regulation and role of private sector