Maynilad maintains and operates three world-class water treatment plants.

La Mesa Treatment Plant 1 is a conventional-type plant with a maximum design capacity of 1500 million liters per day (MLD). It was designed by American company Camp, Dresser and Mckee.

La Mesa Treatment Plant 2 is a pulsator-type plant that has a design capacity of 900 MLD. It was designed by Degrémont, a French company recognized as a world specialist in water treatment plants.

Both treatment plants are ISO 9001:2000-certified which means that Maynilad’s water treatment process meets global standards for Quality Management.

Putatan Treatment Plant is the largest membrane-based water treatment plant in the Philippines, and is also the first of its kind in the country to use large-scale microfiltration and reverse osmosis.

All three water treatment facilities produce water that meets the Philippine National Standards for Drinking Water (PNSDW) of the Department of Health (DOH).