The overcrowded peri-urban slums of Luanda (where over two-thirds of the population of Angola now lives) are clearly unhealthy places to live. However, very little information on environmental health is available which might be used to plan rehabilitation programmes, and whatever information there is tends to be dispersed, inaccessible and difficult to use. This proposal is for the development of a database, and a Geographical Information System, of appropriate environmental health indicators for a significant, representative area of peri-urban Luanda. This is the first phase of a programme to develop national capacity to collect and use data, through GIS, on environmental health that can assist in the planning of national reconstruction.