T seeks to implement grey-water treatment constructed wetlands within a modern, urban, mega-city slum context. Grey water in such a context is very different to that emanating from a developed urban environment. The project is located Alexandra, a township which includes formal, semi-formal and informal settlements, immediately adjacent to Sandton, the economic centre of Africa. The project draws on social science, psychology, biology, chemistry and engineering skills to understand the specific context with a view to designing, building, implementing and monitoring a grey-water treatment system which will exceed the lifespan of the funding. There is a strong focus on understanding and hopefully overcoming the human drivers leading to failure of treatment systems in similar contexts in other parts of the world.More