Arsenic (As) in groundwater is a major health concern in Asia and the risks from using shallow tube wells (STWs) for drinking-water are well- known. At present, twelve countries in the Asian region have reported high As levels in part of their groundwater resources. Bangladesh has the highest percentage of contaminated STWs (~20 percent) and an estimated 30 million people are dependent on those wells for domestic purposes.
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Post By: rajshekar