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In Bangladesh more than 20 million people are forced to drink groundwater contaminated with arsenic in excess of the allowable limits for drinking water set by the World Health Organization. In addition, the accelerated pace of rising sea levels caused by climate change and shrimp aquaculture has led to seawater encroaching on drinking water resources (e.g., ponds and groundwater). The adverse effects, which occur especially during the dry season, have become increasingly serious. Finding a solution to arsenic and/or salinity contamination in drinking water resources is an urgent issue for Bangladesh, and access to safe drinking water is also recognized as an important Millennium Development Goal. Although arsenic and salt are easily removed by advanced membrane treatment systems, high operating and maintenance costs along with electricity shortages make installing such systems difficult for poor people in the coastal areas in Bangladesh. A "Sky Water Harvesting System" utilizing rainwater, which has not been affected by arsenic or salt and does not require electricity during the purification process, has recently drawn attention as an alternative, sustainable method of producing safe drinking water in the coastal areas, which have been suffering from arsenic pollution and salination. In response, a Research Study for Implementation of Sky Water Harvesting with Micro Credit Systems was commenced in March 2011 to compile a sky water business plan to implement a social business strategy formulated from a baseline survey, needs assessment of beneficiary groups, pilot project monitoring, and an assessment of business plan impacts.