This is the fifth volume in the series of books on the Southeast Asian water environment. The most important articles presented at the Eighth, Ninth and Tenth International Symposiums on Southeast Asian Water Environment have been selected for this book. It covers monitoring, treatment, and management issues related with environmental water, water supply, and wastewater. As the emerging issues, pollution with micropollutants and effects of climate change on water environment are also included. This publication is the result of building an academic network among researchers of related fields from different regions to exchange information. This book is an invaluable source of information for researchers, policy makers, NGOs, NPOs, and those who are concerned with achieving global sustainability within the water environment in developing regions.