The Khowai is a trans-boundary river that originates in the eastern part of the Atharamura Hills of Tripura in India and .

Flowing north-north-west, it leaves India at Khowai, and enters Bangladesh at Balla in Habiganj District.

The river passes east of Habiganj town, where it is under pressure from pollution and encroachment, including cultivation and construction of concrete houses in the areas on the banks of the Khowai.

North of town it turns west, and joins the Kushiyara near Adampur in Lakhai Upazila, Habiganj District.

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