Palaru is an ancient river of Tamilnadu, some archeologists say Palaru, river is the "ancient Cauvery" [paleo cauvery]. Palaru begins from Nandi hills, Karnataka and flows to Andhra Pradesh, then to Tamilnadu. Breaking the 1892 mysore samasthanam agreement Karnataka built two major dams and stopped the water to Tamilnadu, Within the stretch of 32 kms Andhra Pradesh built 22 dams. Once a perennial river now become a desert, for five decades there is no water in the river. In Tamilnadu from Vaniyambadi to Ranipet nearly 1000 tannery industries pollute the river with very dangerous chemicals like chromium and nickel. In Kancheepuram once a Buddhist capital. The Palaru changed in to complete sand mining sight. Both the private contractors and the government of Tamilnadu dig the river up to 40 feet to take the sand. In the age of mineral water bottle, a great drinking water source is completely destroyed by the central and state govt.