It was found that domestic wells were highly contaminated by both nutrients and coliform. The contamination was intensified during rainy season. Only 5% of the collected water samples met WHO and Tanzania standards for drinking water. This explains why in Zanzibar water borne diseases such as cholera and typhoid fever occur frequently. The major sources of contamination were found to be the pit latrines/ septic tanks.
Said A H Vuai; Microbial and Nutrient Contamination of Domestic Well in Urban-West Region, Zanzibar, Tanzania
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Last date updated on July, 2014