A new ₱3.93 billion wastewater treatment plant to serve over 650,000 Metro Manila residents was inaugurated by President Ferdinand R. Marcos Jr. Friday (January 16, 2026).
The Aglipay Sewage Treatment Plant (STP) in Mandaluyong is one of the largest wastewater facilities built to help clean up Metro Manila’s waterways and protect public health, according to a news release from Malacañang.
The Aglipay STP, managed by Manila Water, can treat up to 60 million liters of wastewater per day, with a built-in capacity to expand to 120 million liters per day as population density increases. The facility serves a 2,115-hectare catchment area covering Mandaluyong, San Juan, and Quezon City, benefiting over 650,000 residents.
Built at a cost of ₱3.93 billion, the project is part of the government’s broader push to strengthen sanitation infrastructure in Metro Manila and reduce the volume of untreated wastewater flowing into rivers and coastal waters.
“Beyond the machinery, fascinating as it is, what really matters is the result, and that is cleaner water returned to the environment and reduced exposure of our people to the hazards of untreated sewage,” President Marcos said during the ceremony.
“This is how a carefully planned and thoroughly executed infrastructure directly improves the lives of our people.”
The President said the impact of the facility will be felt daily—not only in households, but also in rivers and surrounding communities—by improving water quality and supporting the long-term rehabilitation of Manila Bay.
“This means that more liters of safe water is available for public consumption and more rivers and seas are preserved for future generations,” he added, stressing that wastewater treatment is essential to public health, environmental protection, and sustainable development.
President Marcos noted that the Aglipay STP is only part of a larger program, with five more wastewater treatment plants currently under construction across Metro Manila and nearby areas.
Under the Revised Concession Agreement and Republic Act Nos. 11600 and 11601, the government targets connecting 76 percent of households in Metro Manila, Cavite, and Rizal to sewerage systems by 2047, with the remainder covered by proper sanitation services.
The Chief Executive recognized Megawide Consortium alongside Manila Water for their role in building and operating the facility, citing their technical expertise in meeting environmental standards and ensuring reliable service.
He noted that infrastructure alone will not solve sanitation problems, calling on government agencies, the private sector, and citizens to practice responsible waste disposal and help keep communities clean.
“Ang kalinisan ng ating kapaligiran ay salamin ng ating disiplina bilang isang bayan,” President Marcos said.