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The availability of safe sanitation is a major global challenge, where more than a third of the world’s population lacks access to adequate sanitation. This problem is particularly severe in peri-urban areas and urban slums, where lack of adequate infrastructure is compounded by poor access to health and education amenities.

In the densely-populated peri-urban neighborhoods in Brazil - like elsewhere in the developing countries - domestic liquid wastes are disposed of in latrines or septic wells. This calls for out-of-the-box thinking on provision of sanitation services.

This project, focused on Sao Paulo, Brazil, investigates such an approach for provision of adequate sanitation. The primary catchments for the city’s water supply system (Billings and Guarapiranga resevoirs), are being quickly overrun by unplanned urbanization. Consequences for public health are severe: infant mortality rate (65 per 1000 in Parelheiros and Grajaú) is much higher than in the population at large in Brazil. Thus, the need for urgent solutions is pronounced.

A typical septic well (Jardim Santo Antonio)

Objectives of the project are:

To test and develop a new technological approach using a permeable reactive material in septic well construction

To enhance the capacity of stakeholders in informal settlements to prevent groundwater contamination through provision of in-situ sanitation

To replicate similar solutions in other developing countries

Partners in the project are:

UNU-INWEH

University of Waterloo

University of Sao Paulo

City of Sao Paulo

 

Last updated: 5 February 2007

 
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