Abstract: Salinity intrusion is causing acute drinking water crisis in Southern and coastal part of Bangladesh. During dry season major portion of rural people use pond water for drinking which is unhygienic and also becoming saline gradually. This problem has been even more severe since the cyclone SIDR in 2008. Rainwater harvesting is a laboratory proven sustainable drinking water supply solution. Taking Paikgacha Upazilla in Sathkhira district of coastal Bangladesh the study seeks to analyze the way how rain water harvesting can accelerate the access of coastal people to safe drinking water and to what extent they have willingness to accept and pay for the service.