The Pasig River Rehabilitation Commission hauled 162,390 kilograms of waste (5,413 sacks of garbage), which were pushed by the high tide in Manila Bay into the Pasig River, during a series of massive clean-up operations which started last April 27. The huge volume of waste along Pasig River at present is caused by the backflow of Manila Bay—a natural phenomenon observed especially this time of the year, by the San Juan River and some esteros draining garbage and polluted water after the recent heavy rains.

Over 162k of waste hauled from Pasig River. (2019, May 10). Manila Standard, p. A3.