According to the Decision 99/TTg dated 09/2/1996 and Decision 173/TTg dated 11/6/2001 of the Prime Minister about the Program of residential clusters and lines in flooded areas, all constructed sites have to be ensure a fully equipped infrastructure systems and essential services such as water supply, drainage, sanitary latrines, and all environmental sanitary conditions. However, the actual survey shows that in the residential cluters of the Mekong delta still has many issues raised need to be addressed to help people have better lives, to ensure hygienic conditions and environmental safety.