The Department of Public Health Engineering (DPHE) of Bangladesh first detected Arsenic in groundwater in 1993 and the issue came to limelight at the beginning of 1995 (Nickson et al., 1998). After that, many government and non-government organizations started working on the problem. Among them, Dhaka Community Hospital (DCH); School of Environmental Studies (SES) of Jadavpur University, India; British Geological Survey (BGS); UNICEF; World Vision; Water Partnership Program (WPP) and DANIDA (official Danish aid agency) are worthy of mention here. For every organization, the first job was to identify the arsenic-contaminated wells. High levels of arsenic in well water are causing widespread poisoning in Bangladesh. In a typical aquifer in southern Bangladesh, chemical data imply that arsenic mobilization is associated with recent inflow of carbon (Harvey et al., 2002).