 Muara Angke port is used as a public port, while Ancol marina port is used as a tourist port to connect to the Thousand Islands.On 6 June 2007, the city administration introduced the Waterway (officially "Angkutan Sungai"), a riverboat service along the Ciliwung River.However, because of varying water levels during the dry and wet seasons, and plastic pollution that comes from upstream during heavy rain, this service was discontinued.