The apex court had asked the Centre and the governments of Haryana, Delhi and Uttar Pradesh to furnish information on expenditure incurred by them for making the Yamuna clean.

It had asked the Central Water Pollution Control Board to take sample of water of river Yamuna and submit a report on its cleanliness.

"The Central Water Pollution Control Board shall take samples of water of river Yamuna from the states of Haryana, Delhi and Uttar Pradesh till Agra and submit their report within four weeks," the bench had said.

It directed all the authorities related to the work of controlling the river's pollution to give details of the steps taken by them in this regard. The court had issued the direction taking suo motu cognisance of an article on pollution in Yamuna published in a national daily in 1994.