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Ahana Shrestha ●34 ●41 ●41

Practical Action

answered 2016-01-08 10:43:27

To prevent contamination of groundwater, the bottom of the pit should be at least 1.5m above the water-table level. And have a look on this link:https://answers.practicalaction.org/our-resources/item/ventilated-improved-pit-latrine