How far do people in the developing world have to walk (on average) for water on any given day?


When we visited Tanzania in the summer of 2007, we walked with one local woman for 4 miles (there and back) to collect water from the village's only source (a dirty river). This distance is one that is typically walked by many women and children in developing countries to collect enough water for their families. Sometimes the trip is made 4-5 times a day, meaning that the children often miss school as a result of it, and the women are unable to maintain successful businesses, due to a lack of time. All of this wouldn't be so bad if the water were at least clean, but the water they are collecting is often polluted, meaning that those who drink it could catch a number of diseases, which have the potential to kill if not properly treated. 

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