Manila Water is set to finish the construction of its P8.2 billion Calawis Water Supply System Project by June 2023. The project is composed of the 80 million liters per day (MLD) capacity water treatment plant (WTP), pumping stations, reservoirs, and 21 kilometers of primary transmission line, and is expected to provide treated water to 919,784 population in Antipolo City and nearby towns.
MANILA, Philippines — Manila Water, the east zone water concessionaire, is set to complete the construction of its P8.2-billion Calawis Water Supply System Project by June 2023.
The project sources its raw water from the Tayabasan River in Brgy. Calawis, Antipolo City, is situated in the Upper Marikina Watershed—a region actively supported by Manila Water.
The Calawis Water Supply System Project aims to provide an additional 80 million liters per day (MLD) of treated water to a population of 919,784 in Antipolo City and nearby towns.
While still preparing for full operations, the facility already supplies treated water to some city areas, including the Antipolo Government Center.
The project consists of an 80 MLD water treatment plant (WTP), pumping stations, reservoirs, and a 21-kilometer primary transmission line.
The WTP utilizes Degremont Compact Units (UCD), prefabricated and modular water and wastewater treatment plants engineered for efficient production, transportation, and installation.
This technology significantly reduces the required footprint and construction time. In addition, the project incorporates pipe jacking technology, a trenchless method of installing pipes, for a portion of the pipelaying contract and two river crossings, ensuring the delivery of potable water to customers.
Engr. Vince Siat, Senior Project Manager at Manila Water, stressed the importance of cooperation and support from key stakeholders in successfully completing and operating the project.
He stated, “Manila Water was able to establish good relationships with relevant Local Government Units, the Department of Environment and Natural Resources, the Department of Public Works and Highways, the affected Indigenous People—the Dumagat Remontados of Antipolo City—and the National Commission of Indigenous People.
This enabled us to proceed with the successful development of the project. The Project team has ensured compliance with all necessary laws and regulations, underscoring the company’s commitment to social and environmental sustainability.”
The Calawis Water Supply System Project is integral to Manila Water’s Water Supply Masterplan, which aims to ensure water security and supply reliability in the East Zone for the next few decades while reducing dependence on the Angat Dam.
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