International Drilling to Recover Aquifer Sands (IDRAs)

and Arsenic Contaminated Groundwater in Asia

Elevated groundwater arsenic (As) concentrations impact the health of over 100 million villagers across Pakistan, Nepal, India, Bangladesh, Myanmar, Cambodia, Vietnam, and China who rely on tube wells as their main source of drinking water. Groundwater from these areas can contain 10 to 100-times the World Health Organization's guideline of 10 ?g/L for As in drinking water. Chronic exposure to such elevated As levels is known to cause deadly cancers, cardiovascular disease, and inhibit the mental development of children. The guiding hypothesis for this project is that the distribution of As in reducing groundwater is anchored to the local geology across a range of spatial scales and therefore naturally evolves on 100-1000 year time scales. Human perturbations of the natural groundwater flow could threaten aquifers in Asia that are currently low in As on 10-yr time scales.

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