DENR National Capital Region's North Field Office (NFO) led by DCEO Darryl Olga Arzadon, monitors the status of waterways in Caloocan City. The activity was done to check the condition of the waterways and determine in close coordination with partner barangay and city officials regarding interventions that are needed to ensure that Caloocan waterways remain free of trash and other debris in support to reduce water pollution loading in Manila Bay.

The majority of the rivers, esteros, and creeks of Caloocan City drain to Manila Bay via the Malabon-Navotas-Tullahan-Tinajeros (MANATUTI) River System. MANATUTI is one of the three major river systems of Metro Manila and thus, the trash that is thrown in the midstream and upstream portions of the river system, if left unchecked eventually reaches Manila Bay.

Under DILG Memorandum Circular No. 2019-09, all 5,714 barangays within the Manila Bay Watershed Area have been directed to organize weekly waterway cleanup drives in their respective areas of jurisdiction in support of the Manila Bay Rehabilitation Program.

To clean and bring Manila Bay back to its pristine state, all levels of government, including their partner organizations from the private and civil society sector, must work together in keeping its tributaries clean. The water pollution issue of Manila Bay is on top of the DENR agenda that needs collaborative and immediate actions. As the lead agency, the DENR concerns focus on water quality improvement, habitat restoration, and river basin management.