The western edge of the delta is the river earlier known as Bhagirathi - Ganga, later the Hooghly, which flows south into the sea.
Delta läänepoolses osas asub jõgi, mida varem Bhagirathi - Ganga nime all tunti, praegu kannab see aga Hooghly nime, ning see jõgi voolab lõuna poole, ookeani.