How do we assess and manage the actual risks from water contamination? Can we learn from previous experiences? What can be done in future? This book is the proceedings of the fifth conference on this topic and addresses these topics relating to drinking water and drinking water systems. With emphasis on effectively and efficiently managing the risks and threats and sharing experiences, it provides information on successful use of leading-edge technologies and best practice both now and for the future. The book will appeal across a diverse group from public health professionals, water companies and water security experts and regulators.