The Tunasan River (), also referred to as the Tunasan–Cuyab River, is a river system in the Philippines. This river begins in Dasmariñas, Cavite, and ends at the border of Muntinlupa, and San Pedro, Laguna. It is one of 21 major tributaries of Laguna de Bay.
The river system has six adjoining creeks: There are two in San Pedro, Laguna and Dasmariñas, Cavite Three creeks joins the system from the ponds of The Filipinas Golf Club, and The last one connects from the drainage system of RMT Complex.
The depth of the Tunasan currently varies from .
Both the river and barangay Tunasan got their names from a medicinal plant locally called tunas (Nymphaea nouchali) which was abundant on the Tunasan River and the shoreline of Laguna de Bay.
The Tunasan River received media attention in 1994 and 1995 due to a series of "fish kills" caused by the high Biochemical Oxygen Demand from decomposing water lilies, and by the profusion of residential wastes that find their way into the river during the rainy season.
See also
Laguna Lake Development Authority
List of rivers and esteros in Manila
References
Rivers of Metro Manila
Rivers of the Philippines
Tributaries of Laguna de Bay
Landforms of Laguna (province)