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Providing a Safe Water Supply in the African Bush

Kazuyoshi Kawata
Public Health Reports (1896-1970)
Vol. 82, No. 12 (Dec., 1967), pp. 1057-1062
DOI: 10.2307/4593195
Stable URL: http://www.jstor.org/stable/4593195
Page Count: 7
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Providing a Safe Water Supply in the African Bush
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Abstract

An experience with treating water in the African bush in the Republic of Chad proved that potable water can be prepared in the Lyster bag by prechlorination, coagulation, sedimentation, postchlorination, and adjustment of pH. The treated water had to be free of pathogenic bacteria, viruses, protozoa, cercariae of schistosomes, and Cyclops which serve as the intermediate host of Dracunculus medinensis. This result was attained by maintaining a free chlorine residual throughout a 3-hour treatment period. The free chlorine residual maintained in water drawn from the Chari River was 3 mg. per liter and at three other sites the level maintained was 2 mg. per liter. The bacteriological quality of the water was excellent. A submersible pump and a portable alternator were found to be ideal equipment for the bush. They were relatively easy to handle and effective for drawing water under varying conditions. The system used was adequate, effective, and relatively uncomplicated, and it could be operated with the help of a few untrained villagers.

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