This report is of a study of the informal water sector in Luanda in the post-war context. The research was an applied research project with a view to advocacy for improved Government water policy and practice so as to bring it more into line with the needs of poor consumers who fall outside the formal distribution network. The results of the research will inform programme planning and impact assessments for basic services and public health projects of the World Bank, European Union and the Luanda Urban Poverty Programme (LUPP). The research aimed to understand the post-war evolution of the informal water economy (and how it has evolved since Development Workshop research in the 1990s), understand how it is likely to evolve and contribute to the improvement of the supply of water to communities in informal settlements, understand better how institutional capacity can best be developed (especially at the interface between communities and the service providers) and provide lessons and about the sector to promote pro-poor poverty reduction strategies through better services.