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Research on the health implications of the use of recycled water in South Africa.

South Africa has an inadequate and unreliable supply of water. It is expected that water resources will be a limiting factor to development by the year 2020. Reclamation and reuse of sewage effluent is one possible method of supplementing existing supplies. Windhoek has had direct supplementation of its water supply for over a decade. Guidelines for using recycled sewage as a source of potable water are given and South African studies on chemical, microbiological and virological aspects of reclaimed water are reviewed. Epidemiological studies, retrospective in Windhoek and prospective for Cape Town, are discussed.