This book aims to guide and illuminate future pathways for utilizing these linkages to ensure the quality of water for drinking and other purposes. It delves into a critical yet underexplored domain: the polymer-water nexus. This nexus is a two-sided story: on one hand, polymers offer immense potential for water treatment and protection; on the other, their misuse can cause significant environmental damage. This book will serve multiple purposes – for education, research, and industrial applications – by providing valuable information in a comprehensive and practical format. The ultimate goal is to establish a sustainable bridge between polymer science and water chemistry, with careful consideration of environmental and climatic factors.