Vembanad (Vembanad Kayal or Vembanad Kol) is the longest lake in India, and the largest lake in the state of Kerala. It is also counted as one of the largest lakes in India. A lake spanning several districts in the state of Kerala, it is known by different names in different localities viz. Punnamada Lake in Kuttanad, Kochi Lake in Kochi. The Port of Kochi is located around two islands (the Willingdon Island and Vallarpadam) in a portion of this lake known as the Kochi Lake. The celebrated Nehru Trophy Boat Race is conducted in a portion of this lake; in the Kuttanad region, known as the Punnamada Lake. High levels of pollution have been noticed at certain hotspots of the Vembanad backwaters. Government of India has identified the Vembanad wetland under National Wetlands Conservation Programme.