Upper Wawa Dam is East Zone’s reliable friend

The Philippine Star

June 7, 2026 | 12:00am

MANILA, Philippines — With climate experts warning of a possible strong El Niño episode developing in the coming months and potentially lasting into 2027, concerns over water security are once again taking center stage in the Philippines.

Rising temperatures and below-normal rainfall could place additional pressure on the country’s already stretched water supply systems, particularly in highly urbanized areas such as Metro Manila.

At the same time, the country continues to experience increasingly unpredictable weather patterns — from prolonged dry spells to destructive typhoons — underscoring the urgent need for more resilient and diversified water infrastructure.

Against this backdrop, the need for long-term, climate-resilient water infrastructure has become increasingly urgent, particularly for Metro Manila and nearby provinces that continue to face growing demand and weather-related vulnerabilities.

For decades, Metro Manila has relied heavily on Angat Dam as its primary water source. While Angat has sustained millions of households through the years, dependence on a single major source has long exposed the metropolis to risks brought about by drought, supply interruptions and extreme weather disturbances. The need for additional, dependable water sources has therefore become not only an operational priority, but also a national resilience concern.

This growing need has placed greater focus on major alternative water source developments designed to strengthen supply reliability while helping communities adapt to climate-related challenges.

One of the most significant of these developments is the Upper Wawa Dam, now officially under the exclusive management of Manila Water following its acquisition of WawaJVCo. More than simply adding another water facility to the network, the project represents a major step toward strengthening the East Zone’s long-term water reliability while reinforcing the region’s ability to adapt to the realities of climate change.

The Wawa Bulk Water Supply Project helps address these challenges by providing up to 710 million liters of water per day which will benefit around 3.5 million Filipinos across eastern portion of the MWSS concession area served by Manila Water once all the components are developed and commissioned. As the largest water source development in the Philippines in five decades, the project significantly strengthens the country’s water security capacity at a time when demand continues to rise alongside climate-related threats.

More than water supply

Yet the significance of the Upper Wawa Dam goes beyond water supply alone.

In an era where severe weather events are becoming more intense and more frequent, infrastructure that can both secure water supply and protect communities from disasters becomes increasingly crucial.

In recent years, the facility has demonstrated its value as a flood mitigation measure during major weather disturbances. During Super Typhoon Carina in 2024, the reservoir reportedly helped reduce downstream flooding by regulating water discharge and preventing massive volumes of rainwater from rapidly flowing toward vulnerable communities in Rizal Province and Metro Manila. Government officials noted how the dam’s ability to capture and store excess water helped minimize potential damage in flood-prone areas.

The same was observed during Typhoon Crising in 2025, when officials cited the dam’s role in helping reduce floodwaters reaching Marikina.

As the Philippines prepares for the possible impacts of another super El Niño cycle while continuing to confront stronger storms and changing climate conditions, projects like the Upper Wawa Dam serve as a timely reminder that resilient infrastructure is no longer optional. It is essential. For millions of East Zone customers, that reliability could make all the difference — rain or shine.

Trending