What company was granted a 25-year exclusive concession for the West Zone water and sewerage system in 1997?

The correct answer is significant because Maynilad Water Services, Inc. was granted the 25-year exclusive concession for the West Zone water and sewerage system in Metro Manila as part of the privatization of the water system that took place in the late 1990s. This move aimed to improve the quality and efficiency of water services in the region, which had been struggling with issues related to water supply and sanitation.

The 1997 concession specifically allowed Maynilad to manage and operate the water and sewerage services in its designated area, bringing in investments to upgrade infrastructure and enhance service delivery. This arrangement was part of a broader reform initiative undertaken by the government to address the challenges faced in the public water system and to encourage private participation.

In contrast, Manila Water was granted the concession for the East Zone, while NAWASA (National Waterworks and Sewerage Authority) was the public agency responsible for water services before the privatization. The Metropolitan Waterworks and Sewerage System (MWSS) itself was the regulatory body overseeing these concessions. Understanding this context underscores the importance of Maynilad's role in the management of water services in Metro Manila.