This Global Report on Sanitation and Wastewater Management in Cities and Human Settlements is a global reference on sanitation and wastewater in urban settings. It takes stock of the sanitation and wastewater management situation, both in terms of service levels and the supporting functions required to enable service provision at scale. Drawing from existing literature and primary data in 18 cities across Africa, Asia, Europe and Latin America, the Report underlines the scale of the challenge in strengthening wastewater and faecal sludge management at the global level, while also highlighting actions being taken by governments, development partners, city planners, utilities, service providers and researchers around the globe. Focus is on service levels, containment and treatment systems, treatment performance, policies and regulations and institutional arrangement, planning and investment, monitoring, and financial performance.