The 20th Leading Edge Conference on Water and Wastewater Technologies (LET 2026), themed "Resilient Water in a Changing World," will bring together global leaders, innovators, and practitioners to address growing uncertainties such as climate change, emerging contaminants, increased water reuse demands, and the push toward Net Zero. This milestone event will emphasize forward-looking solutions to enhance the resilience of urban water systems while advancing the One Water paradigm through interdisciplinary collaboration and cutting-edge technologies. Featuring a thoughtfully curated program by an expert committee, the conference will highlight pioneering research, novel applications, and diverse perspectives aligned with both global and regional priorities. Building on its two-decade legacy as a premier forum, LET 2026 invites researchers, practitioners, and industry leaders to contribute transformative and sustainable ideas that challenge conventional approaches and shape the future of water and wastewater infrastructure.