Making drinking water safe in Bangladesh

Welcome to Bangladesh, the land of rivers, 9,015 kilometres from the
University of Newcastle. Bangladesh was one of the first countries that recognised poisoning from arsenic. Nearly 80 million people
have been affected. This is said to be the
greatest mass poisoning in the history of the humankind. What we discovered was the way people were digging wells was actually killing them. They built deep tube
wells to avoid parasites, but they were pulling dangerous levels of arsenic into the water system. At the University of Newcastle, we discovered that you can actually get safe drinking water
from shallow wells. My team came up with a
traffic light approach. We painted wells with elevated levels of arsenic red. And shallow wells, safe to drink from we painted green. Green means good. Red means no. (speaking in foreign language)

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