Manila Water’s earthquake-resilient San Juan Reservoir to strengthen water security for growing cities by 2026

Manila Water’s earthquake-resilient San Juan Reservoir is being constructed to bolster water supply reliability for the rapidly growing cities of Quezon City, San Juan, and Mandaluyong. The ₱932-million project, located along N. Domingo Street in Quezon City, is designed to store up to 56 million liters (ML) of water and withstand earthquakes up to magnitude 7.2—ensuring continued service even in the face of major seismic events.

The new facility replaces the original reservoir built in 1968 and incorporates modern engineering standards, including upgraded electrical, instrumentation, mechanical, and site development systems. Its robust design reflects Manila Water’s commitment to building resilient infrastructure that can support the region’s increasing demand for clean and reliable water.

“The San Juan Reservoir is more than just a new facility. It’s a forward-looking investment in resilience and reliability. As our cities continue to grow, we must ensure that our infrastructure keeps pace. This project reflects Manila Water’s commitment to safeguarding water supply for our communities, even in the face of natural disasters like major earthquakes.”

Manila Water Communication Affairs Group Director Jeric Sevilla.

As of July 2025, the Manila Water’s earthquake-resilient San Juan Reservoir project has reached 26.90% completion and is on track for full completion by the third quarter of 2026. Upcoming construction milestones include continuous excavation and lean concreting, rebar fabrication for Phase 1 Mat Foundation, and installation of Mat Foundation Rebar. To minimize disruption to nearby communities, acoustic barriers have been installed to reduce noise and other construction-related disturbances.

This reservoir is a strategic investment in long-term water security and disaster preparedness. As Metro Manila’s population continues to grow, the San Juan Reservoir will play a critical role in Manila Water’s broader efforts to expand and safeguard water supply infrastructure across the East Zone.

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