Vasai, historically known as Bassein or Baçaim is a historical village to the North of the city of Mumbai in the Maharashtra state of India.Vasai, which is not same as Sopara or Shurparak but rather a superset of it, has five rivers. Two of them, namely Vairarini in the North and Ulhas in the South, mark Shurparaks limits. These rivers form the Vaitarna Creek and the Ulhas or Vasai Creek respectively. Three small rivers named Pandu Nadi, Preta Nadi and Gaarudi Nadi run off the Tungar Hills and meet the sea through the land of Shurparak, forming the Bolinj Creek, Sopara Creek and Vagholi Creek. All of these creeks are now drying off.