This paper explores the potential of recycled wastewater (reused water) to contribute significantly to achieving the Sustainable Development Goals (SDGs), specifically SDG 6, which focuses on clean water and sanitation. It highlights the increasing global water scarcity and pollution, exacerbated by population growth, urbanization, and climate change. The paper argues that wastewater reuse, both direct and indirect potable reuse (DPR and IPR), offers a viable solution to augment water resources and improve sanitation. It presents case studies from various countries, including the United States, Singapore, Namibia, and others, showcasing successful implementations and associated challenges. The paper also emphasizes the importance of robust regulations, advanced treatment technologies, public acceptance, and ongoing research to address knowledge gaps regarding emerging contaminants and ensure the safe reuse of wastewater for potable purposes.

Cecilia Tortajada