Food and Agriculture Organization of the United Nations, Remediation of Arsenic for Agriculture Sustainability, Food Security and Health in Bangladesh: “Contamination of shallow groundwater aquifers with arsenic (As) has been reported in over 20 countries around the world…but is most serious in the Bengal Delta region of Bangladesh and West Bengal, India where the groundwater has been widely developed to supply drinking and irrigation water. An estimated 30 million people drink water from arsenic-contaminated tube wells in Bangladesh. Considerable efforts have been made to identify contaminated wells and to develop practical and acceptable water treatment systems for rural households..In addition to drinking water health risks, FAO was concerned about the potential levels of arsenic entering the food chain via absorption by crops from irrigated water. Because rice is the staple food in Bangladesh, and it is consumed in large quantities, arsenic-contaminated rice could aggravate human health risk when consumed along with As-laden drinking water.”