Pampa River is a combination of a number of rivers originating from the lands of Peermade. It is the third largest river in Kerala. It is considered as a ‘Saint River’. It originates about 1650 m above the sea level. It has a length of 177 km. The river splits into several tributaries and falls into the Vembanad Lake. It runs through Ranni, Thiruvalla, Changanacherry and Ambalapuzha. Kakkiyar, Azhuthayar, Kakkatar and Kallar are the main tributaries. The main dams of this river are Pampayar and Kakiyar. Maniyar Irrigation Project and Sabarigiri Hydro Electro Project are situated there.
The renowned rice producing region, Kuttanad, gets water supply from Pampa River. The holy place Pampa, near to Sabarimala, is situated on the banks of the Pampa River. The Perunthnaruvi waterfalls on the banks of the Pampa River is a favourite picnic spot for both domestic and foreign tourists. The Aranmula Boat Race and Maraman Convention, at Maraman near Kozhenchery, are also held in this river.