All parameters of water quality of the Yamuna indicate that it more or less resembles a drain, the Supreme Court said on Friday, directing authorities to make a joint effort to make the river pollution-free.

“All authorities are expected to make some joint efforts to make Yamuna free of pollution,” a bench of justices Swatanter Kumar and S.J. Mukhopadhaya said while asking the Central Pollution Control Board (CPCB) and Delhi Jal Board (DJB) to conduct a joint inspection on rising pollution level of the river in the national capital.