The project AQUAREC “Integrated concepts for reuse of upgraded wastewater” was funded by the Fifth Framework Programme of the European Commission. Its major aim was to investigate and develop concepts and methodologies supporting rational and knowledge-based waste water reuse strategies. This publication presents practical information on waste water reuse concepts based on actual and proved management and operational practises. A broad approach has been considered by addressing institutional, organisational, legal, economics, financial, social and environmental issues together with technological aspects. The targeted readers are mainly practitioners concerned with implementation of waste water reuse schemes, but this publication may also become ‘the wastewater reuse manual’ for decision makers, local authorities, consultants and research bodies involved in the area.