Manila Water’s P8.2-billion Calawis Water Supply System Project (WSSP) which was physically completed in June 2023, is already supplying clean and potable water to some areas in Antipolo including the Antipolo Government Center.

After the testing stage in May 2024, the Calawis WSSP is expected to provide up to 80-million liters per day (MLD) of additional treated water to 919,784 residents of Antipolo City and nearby towns. To help reach its customers, the system employs an 80 MLD water treatment plant, pumping stations, reservoirs, and a 21-kilometer primary transmission line.

In photo: Degremont Compact Units (UCDs) in the Calawis Water Treatment Plant.

Its water treatment plant also utilizes Degremont Compact Units (UCDs). These are prefabricated, modular water and wastewater treatment plants engineered for more efficient production, transportation, and installation. The UCDs significantly reduces the footprint requirement and construction time.   

The project is part of Manila Water’s Wawa-Calawis Water Supply System which will bring an additional 518 MLD of water for its customers in Antipolo City, Teresa and Baras in Rizal, Pasig, Taguig, Makati, and portions of Manila. Under the company’s Service Improvement Plan, the Calawis WSSP aims to reduce our dependency to Angat Dam, which provides more than 90% of the water needs of Metro Manila and Rizal Province.

Manila Water’s Service Improvement Plan for 2023-2027 includes the construction of new water sources, adjacent infrastructure, and rehabilitation of existing facilities. It is anchored in the company’s Four Pillars of Sustainability: Water Security, Service Accessibility, Service Continuity, and Environmental Sustainability.