MANILA Water Co., the Ayala-led concessionaire in Metro Manila’s East Zone, now operates 38 used water treatment plants with a total capacity of 135 million liters per day, making it the largest sewerage operator in the Philippines.

According to the company, sewerage and sanitation are very critical issues in the whole concession area where nearly 80 percent of Metro Manila homes still use septic tanks, most of which are improperly designed and not well-maintained.

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