Thalassery River is also known as Ponnayam River and this river originates from the western cliffs of Kunnoth forest and flows 28 km before joining the Arabian Sea. The Thalassery river is also called as Kuyali Puzha and has one tributary named Muriya. Thalassery, the famous city in Kannur is situated on the bank of Thalassery river and it is one of the major sources of irrigation in these areas.
It is one of the seven rivers that flow in Kannur district of Kerala and acts as a major source of water at the place through which it flows. The Kunduchira dam at Moozhikkara is one major dam of Thalassery river.
Like any other rivers in Kerala, the Thalassery river or Kuyali Puzha is also facing various issues that come from pollution, deforestation, sand-mining etc. The authorities are trying their best to tackle this issue and the beneficiaries of the Thalassery or Ponnayam river are very much optimistic about the same. Even though the river is small in size, it has great importance for the people living in Kannur and is a major landmark for the tourism industry in this place.