La Mesa Watershed in Quezon City is the primary source of drinking water of about 12 million Metro Manila residents.
The park is owned by the Metropolitan Waterworks and Sewerage System (MWSS), a government agency. La Mesa Watershed is 2700 hectares, 700 hectares of which is the reservoir and 2000 hectares of which is the surrounding forest.
This forest is the last remaining one of its size in Metro Manila and serves as its carbon dioxide sink. La Mesa Watershed, therefore, is vital to the city, not only because it is a primary source of drinking water, but also because its forest functions as the lungs of Metro Manila, providing it with clean air. (From the La Mesa Ecopark Website).
Mabuhay ang La Mesa Watershed!