This book presents the selected papers presented at the 5th International Symposium on Water Pollution and Treatment (ISWPT 2022), held during October 28–29, 2022, in Bangkok, Thailand. It consists of themes pertaining to water management, policy and governance, and water governance and provides readers with comprehensive information on the principles of sustainable water resources management, as well as recent advances, directions for future research, and policy development for sustainable water resources management. This book is of interest to scientists, engineers, government officials, and water resource managers.