Owing to climate change related uncertainties and anticipated population growth, different parts of the developing and the developed world (particularly urban areas) are experiencing water shortages or flooding and security of fit-for-purpose supplies is becoming a major issue. The emphasis on decentralized alternative water supply systems has increased considerably. Most of the information on such systems is either scattered or focuses on large scale reuse with little consideration given to decentralized small to medium scale systems. Alternative Water Supply Systems brings together recent research into the available and innovative options and additionally shares experiences from a wide range of contexts from both developed and developing countries. Alternative Water Supply Systems covers technical, social, financial and institutional aspects associated with decentralized alternative water supply systems. These include systems for greywater recycling, rainwater harvesting, recovery of water through condensation and sewer mining. A number of case studies from the UK, the USA, Australia and the developing world are presented to discuss associated environmental and health implications. The book provides insights into a range of aspects associated with alternative water supply systems and an evidence base (through case studies) on potential water savings and trade-offs. The information organized in the book is aimed at facilitating wider uptake of context specific alternatives at a decentralized scale mainly in urban areas. This book is a key reference for postgraduate level students and researchers interested in environmental engineering, water resources management, urban planning and resource efficiency, water demand management, building service engineering and sustainable architecture. It provides practical insights for water professionals such as systems designers, operators, and decision makers responsible for planning and delivering sustainable water management in urban areas through the implementation of decentralized water recycling. Authors: Fayyaz Ali Memon, Centre for Water Systems, University of Exeter, UK and Sarah Ward, Centre for Water Systems, University of Exeter, UK

During the third decade of the 21st century, communities across the world are being challenged with water scarcity both in rural and urban areas. Another significant problem is the energy demand for producing potable water. Our recent book “Resilient Water Management Strategies in Urban Settings: Innovations in Decentralized Water Infrastructure Systems” (Springer; 2022) introduced various facets of decentralized water infrastructure and the significant need for a shift toward using locally available alternative water sources. The proposed volume will expand on the concept and use of alternative water sources; rainwater, stormwater, wastewater/greywater, saline waters, and atmospheric water. Use of alternative water sources for potable purposes is a critical emerging research and technology area. In our knowledge such a book does not exist at this time. This volume will be a significant resource for researchers and graduate level teaching, and serve as a roadmap for water resource engineers and planners tackling water scarcity and diverse water resources portfolios.