Mumbai one of the most populous city of the world quenches it’s thirst from 7 lakes/dams which supply fresh water. The 4 dams situated in the outskirts of Mumbai in Shahapur Taluka of Thane district delivers approximately 3 billion litres of water daily. These 4 dams are Vaitarna, Tansa, Bhatsa and Modak Sagar. The other three 3 lakes are located in Mumbai itself. All the three lakes in Mumbai were formed as a result of Mumbai Government’s initiative to store and control rainwater flowing from the Mithi river catchment. The largest one is the ‘Vihar Lake’, stretching about 27 miles and is located near the ‘Sanjay Gandhi National Park’. The second largest lake is Tulsi Lake in Mumbai. Water from the Tulsi Lake is extremely fresh and is used as drinking water. The artificial lake that was built by the British in 1890 is Powai Lake. It is located near the Indian Institute of Technology (IIT) and considered as an important tourist spot.