The Ganges is the most sacred river to Hindus[4] and is also a lifeline to millions of Indians who live along its course and depend on it for their daily needs.[7] It is worshiped as the goddess Ganga in Hinduism.[8] It has also been important historically: many former provincial or imperial capitals (such as Patliputra,[9] Kannauj,[9] Kara, Kashi, Allahabad, Murshidabad, Munger, Baharampur, Kampilya and Kolkata) have been located on its banks.
The Ganges was ranked among the five most polluted rivers of the world in 2007,[10] with fecal coliform levels in the river near Varanasi more than one hundred times the official Indian government limits.[11] Pollution threatens not only humans, but also more than 140 fish species, 90 amphibian species and the endangered Ganges river dolphin.[10] The Ganga Action Plan, an environmental initiative to clean up the river, has been a major failure thus far,[12][13][14] due to corruption and lack of technical expertise,[15] lack of good environmental planning,[16] and lack of support from religious authorities.