The Ganga basin is one of the most densely populated regions on earth. The untreated sewage dumped Into the river, Industrial waste, Agriculture run-off, Remnants of partially burned or unburned bodies From funeral pyre, and animal care assets all contribute to pollution in the ganga. High levels of disease, Causing bacteria and toxic substances have also been found in the ganga. Precise source of Ganga river is Gaumukh, which is about 13 miles ( 21 km ) southeast of Gangotri is considered to be the precise source of the Ganga river, Gangotri itself is a sacred place for Hindu Pilgrimage