Water issues have long challenged human civilization, but the 21st century has brought complex new dimensions to this age-old problem. In the wake of 9/11, cybersecurity concerns have come to dominate water infrastructure management and research. The intensifying climate crisis further strains water resources and systems. Most recently, the COVID-19 pandemic laid bare drinking water quality failings, disproportionately impacting marginalized communities.As the water sector confronts this evolving landscape of challenges old and new, public access to objective scientific information is imperative. This book bridges that gap, providing citizens, students, educators, and other stakeholders with authoritative coverage of cutting-edge water science, technology, and innovation.Readers will gain insight into pressing issues like infrastructure cybersecurity, climate change adaptation, contamination and pollution remediation, and equitable provision of clean, safe drinking water. The text outlines state-of-the-art technological and strategic solutions while unpacking complex themes in accessible language. It is essential reading for anyone seeking the facts and practical tools needed to meet the water sector's unprecedented 21st century tests. From concerned citizens to aspiring scientists, this book empowers all readers with the knowledge to navigate these troubled waters.