Adi Ganga is a historical river in West Bengal, India, that flows through the city of Kolkata. It is considered a distributary of the Hooghly River and has significant cultural and religious importance. The river was once a vital waterway for trade and transportation, connecting various parts of the region. Over time, Adi Ganga has faced pollution and encroachment, leading to a decline in its ecological health. Efforts are being made to restore the river and improve its surroundings, highlighting its importance to the local community and the environment.