ABSTACT Dumai City is a city in Riau Province, Indonesia, about 188 km from Pekanbaru City. Dumai is a city with the third largest administrative area in Indonesia, after Palangka Raya City and Tidore Islands City. The city originated from a small hamlet on the east coast of Riau Province. The average height is 3 meters above sea level. Dumai City itself has problems with places where peop…