To evaluate the existing water and sanitation situation and health threats, the study has been conducted after one year of cyclone Aila in a disaster prone coastal union of Khulna district. A detailed questionnaire survey has been carried out in household level and simple random sampling technique has been used in sampling process. The study has revealed that all the households use rain water as primary source and 77.14% households use sweet pond water as secondary source for drinking and cooking purposes. The study has found that the sanitation condition is abundantly unhygienic, because 61.42% households use hanging toilet and almost all the households directly dump children feces into the river or tidal water. People have not sufficient supply of washing materials that is why 41.42% households wash their hands after defecation and before taking any food using soil. On the other hand, outbreak of water born diseases is in severe level and 76% respondents have considered skin disease in rank one and 60% respondents have considered the outbreak of diarrhoea in rank two. The study has also showed priority based community demands on various water supply and sanitation issue for the development of these systems as 59.67% respondents place water tank and dram supply and reconstruction of embankments (75%) as first priority.