Environmental Science and Technology 2010Vol - 1 This study explores the status of arsenic contamination in tubewell water in southern Bangladesh. Through a survey of 6,593 households, a total of 3,812 tubewells were sampled at baseline (2006/07) and 3,591 at midline (2009). Households were selected through multi-stage sampling procedure where each sub-district was considered as a cluster. Findings reveal that proportion of unmarked (to identify presence of arsenic) tubewells .......