Hindus revere the Yamuna but it is tapped for drinking and used as a dumping ground.
The Indian Government has spent more than $1.2 billion on schemes to clean up the revered Yamuna River, but it is now more toxic than at any other time in its history.
The Yamuna is worshipped with the Ganges as one of Hinduism's holiest rivers. For Hindus, it is a living goddess, whose water once parted to allow Lord Krishna and his father to flee from their would-be killers. It flows from the Yamunotri Glacier in the Himalayas down through Haryana to Delhi and on to Agra, past the Taj Mahal. But even before it reaches the Indian capital, most of its water is siphoned off into canals for irrigation and drinking water.
The growth in New Delhi's population to 22 million and the rise of illegal slums has led to a great increase in human waste and rubbish, much of which is dumped in the river. More than 1.8 billion litres of sewage enters it from Delhi's drains each day without passing through the city's treatment plants. Human ashes, leather tanning chemicals, pesticides and painted religious idols all add to the toxicity.