The Pasig River is a river in the Philippines that connects Laguna de Bay to Manila Bay. Stretching for 25 kilometres (15.5 mi), it is lined by Metro Manila on each side. Its major tributaries are the Marikina River and San Juan River.
The Pasig River is technically a tidal estuary, as the flow direction depends upon the water-level difference between Manila Bay
and Laguna de Bay. During the dry season, the water level in Laguna de Bay is low and the flow direction of the Pasig River depends on the tides. During the wet season, when the water level of Laguna de Bay is high, flow is normally from Laguna de Bay towards Manila Bay.The Pasig River used to be an important transport route in Spanish Manila. Due to negligence and industrial development, the river has become very polluted and is considered dead (unable to sustain life) by ecologists.
A total of 16 bridges cross the river. The first bridge from the source at the Laguna de Bay is the Napindan Bridge, followed by the Arsenio Jimenez Bridge. Crossing the Napindan Channel in Pasig is the Bambang Bridge.
The growth of Manila along the banks of the Pasig River has made it a focal point for development and historical events. The foremost landmark on the banks of the river is the walled district of Intramuros
, located near the mouth of the river on its southern bank.
Pasig River's northern bank and within the Manila district of Sta. Mesa is the main campus of the Polytechnic University Of The Philippines
City, along the southern bank of Pasig, is the Sta. Ana Racetrack and the Rockwell Commercial Center, a high-end office and commercial area containing the Power Plant Mall. At the confluence of the Pasig and Marikina rivers is the Napindan Hydraulic Control Structure, which regulates the flow of water from the Napindan Channel.