Water is an essential element in maintaining life and is needed for all social and economic endeavours. It is impossible to overstate the importance of water in our daily lives. It is a vital element of nearly all aspects of human existence from sustenance, sanitation, and health, to basic human security. However, the increase in world population and rapid socio-economic development amongst other reasons impose high pressure on water resources around the world. Therefore, water security is a global concern today. Water for All: A Tribute to Prof. Dr. Ismail Abustan, presents an adaptive approach on various aspects on water and its management. In Malaysia’s context, this approach is very useful in trying to achieve and promote economic and social development without jeopardizing the sustainability of the ecosystem. This book highlights various studies and perspectives by a group of researchers on water and its management within the context of Integrated Water Resources Management (IWRM) that they have worked on with the late Prof. Dr. Ismail Abustan.