The Yamuna River is the largest tributary of the Ganga. It travels barely a distance of 22 km through Delhi. However, this region contributes to about 80 per cent of its total pollution load. Currently, this stretch discharges waste water from almost 22 drains into the river. Untreated effluents, containing toxins and chemicals, released from houses and industries creates froth (white foam) on the river’s surface. Algae, in addition, prevents sunlight from venturing into the depths of this river. Plus, low water level in the river causes concentration of these pollutants…
A Kolkata man has taken it upon himself to document life and livelihoods along the river Ganga[The Ganga] is dying. Pollution from the factories and farms of the fastest-growing large economy in the world . . . has turned its waters toxic—BBC The Ganges, India’s holy river, is also one of the most polluted in the world . . . There are many causes of Ganges river pollution—English Online