Pasig River
| Pasig River | |
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| Country | Philippines |
|---|---|
| Regions | National Capital Region, Calabarzon |
| Tributaries | |
| - left | Pateros-Taguig River, San Juan River |
| - right | Marikina River, Napindan River |
| Cities | Manila, Makati, Mandaluyong, Pasig, Taguig |
| Source | Laguna de Bay |
| - coordinates | 14°31′33″N 121°06′33″E / 14.52583°N 121.10917°E |
| Mouth | Manila Bay |
| - location | Manila |
| - elevation | 0 m (0 ft) |
| - coordinates | 14°35′40″N 120°57′20″E / 14.59444°N 120.95556°ECoordinates: 14°35′40″N 120°57′20″E / 14.59444°N 120.95556°E |
| Length | 27 km (17 mi) |
| Basin | 570 km2 (220 sq mi) |
 A drainage map of the Pasig-Marikina River system
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The Pasig River (Filipino: Ilog Pasig and Spanish: Río Pásig) is a river in the Philippines that connects Laguna de Bay to Manila Bay. Stretching for 25 kilometres (15.5 mi), it bisects the Philippine capital of Manila and its surrounding urban area into northern and southern halves. 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 with the river's flow direction dependent on the tides. During the wet season, when the water level of Laguna de Bay is high, the flow is reversed towards Manila Bay.
The Pasig River used to be an important transport route and source of water for Spanish Manila. Due to negligence and industrial development, the river has become very polluted and is considered dead (i.e., unable to sustain life) by ecologists. The Pasig River Rehabilitation Commission (PRRC), which was established to oversee rehabilitation efforts for the river, is supported by private sector organisations such as the Clean and Green Foundation, Inc. that introduced the Piso para sa Pasig (Filipino: "A peso for the Pasig") campaign in the 1990s.
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