Globally, over 80% of all wastewater is discharged without treatment. This report of the UN World Water Assessment Programme assesses the problem of wastewater per sector and per region. We recommend chapter 9 on Regional Aspects, Africa, and chapter 16 on Water Reuse and Cost Recovery, and chapter 17 on Knowledge, Innovation, Research and Capacity Development....

Increasing the access to improved sanitation facilities is an important Millennium Development Goal. It is also still a large challenge, especially in growing cities and slums. The guidance notes on services for the urban poor gives an overview of the most important lessons learned for implementation and creating an enabling environment....