The Morong River ( tl, Ilog ng Morong), also referred to as the Morong-Teresa River, is a

river system In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of land, whether a particular region is dominated by har ...

in Rizal, Philippines. It is one of 21 major

tributaries A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...

of Laguna de Bay. It covers 14

barangay A barangay (; abbreviated as Brgy. or Bgy.), historically referred to as barrio (abbreviated as Bo.), is the smallest administrative division in the Philippines and is the native Filipino term for a village, district, or ward. In metropolita ...

s and stretches from

Antipolo Antipolo, officially known as the City of Antipolo ( fil, Lungsod ng Antipolo), is a 1st class component city and capital of the province of Rizal, Philippines. According to the 2020 census, it has a population of 887,399 people. It is the ...

down to

Teresa, Rizal Teresa, officially the Municipality of Teresa ( tgl, Bayan ng Teresa), is a 2nd class municipality in the province of Rizal, Philippines. According to the 2020 census, it has a population of 64,072 people. It is situated in the slopes of the S ...

Morong, Rizal Morong, officially the Municipality of Morong ( tgl, Bayan ng Morong), is a 2nd class municipality located in the province of Rizal, Philippines. As per the 2020 census, Morong has a population of 71,151 people. The town is also known for pro ...

and finally to Laguna de Bay. The Morong River sub-basin has a

drainage area A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, t ...

of . On 1991, a study noted that

eutrophication Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytopla ...

in Laguna de Bay could be attributed to nutrients brought to the lake as a result of the tremendous deterioration of the Morong River and the San Pedro River. In the case of the Morong River, this increase was said to be a result of draining effluents from

hog farm The Hog Farm is an organization considered America's longest running hippie commune. Beginning as a collective in North Hollywood, California, during the 1960s, a later move to an actual hog farm in Tujunga, California gave the group its na ...

s. A 1994 cleanup drive initiated by the

Laguna Lake Development Authority The Laguna Lake Development Authority (LLDA), one of the attached agencies of the Department of Environment and Natural Resources (DENR), is responsible for the preservation, development, and sustainability of Laguna de Bay (Laguna Lake) and its ...

in cooperation with the local communities and local government units of Antipolo, Morong, and Teresa removed some seven truckloads of garbage and cleared a portion of the river from water lilies blocking the waterway.

References

See also