Kali river, which originates in the Rajaji Range of Sivalik Hills and travels about passing through Saharanpur, Muzaffarnagar, Meerut and Bagpat districts, merges with Hindon River, before it merges with the Yamuna River. The Kali river is also highly polluted and adds to the pollution of the Hindon, as it passes through a populated and industrial belt of Uttar Pradesh.