The government declared that the Ganges river between Allahabad and Haldia is National-Waterway No.1. The river has many industrial towns like Patliputra, Kannauj, Kanpur, Kara, Prayagraj, Varanasi, Ghazipur, Bhagalpur,Munger, Murshidabad,Baharampur and Kolkata on its banks. The Ganges Basin drains 1,000,000-square-kilometre (390,000 sq mi) and supports one of the world's highest densities of humans. The average depth of the river is 52 feet (17 m), and the maximum depth, 100 feet (33 m).