Jakarta is a city with the highest population in Indonesia. Jakarta’s population in 2014 is reaching 28 million with only 661,52 km2 area. This conditions caused too many problems, one of them is a polluted river. Ciliwung river as an example. It is the biggest and longest yet the most contaminated river in Jakarta. The riverbank of Ciliwung is majority populated with the slums. So, no wonder the river is highly contaminated with the waste from industry and household garbage. The yearly main problem that occured is flood. With the lack of absorptions area and the pile of garbage along the riverbank no wonder if the disaster occur. Beside the flood, the soil erosion also endanger the habitation along the river. Those disaster has taken so many victims until now on. The population along the Ciliwung riverbank having a very low health rate. They are having a difficult acces to a proper water to drink, wash their body and clothes. They are using a water from the contaminated river. It caused too many disease affect the populations there.