Hindon is a tributary of Yamuna and is entirely rainfed, having an approximate catchment area of 7,083 square kilometres (2,735 sq mi).

Kali originates in the Rajaji Range of Sivalik Hills and travels about 150 kilometres (93 mi) passing through Saharanpur, Muzaffarnagar, Meerut and Bagpat districts, merges with Hindon River at Pithlokar near Sardhana.

[1] Near Sardhana lies the ancient Mahadev Temple that is believed to be dating from the Mahabharata period, and where the Pandavas prayed before leaving for the Lakshagrih, the notorious palace made of lac by Duryodhana, at the confluence of the Hindon (previously known as Harnandi) and Krishna rivers (Kali River, Kali Nadi) at Varnavrat, the present Barnava, and where the prince resided with their mother Kunti.

[citation needed] This heavy loading characterizes the presence of toxic contaminants and for the biological diversity of river ecology.

NGOs with RWA are working to aware local and trying to remove solid non-biodegradable wastes like plastic from the river.