Used Water

Aside from providing clean and potable water to more than 90,000 customers in the concession area, Laguna Water also provides used water and sanitation services to help improve the conditions of the water environment in the Province and safeguard public health.

Laguna Water’s steadfast commitment to protect the environment is evident in the magnitude and scale of the company’s efforts to ensure that domestic used water from industrial parks and soon, households, does not contribute to the pollution of rivers and other water bodies. The proper disposal and treatment of used water are essential elements of Laguna Water’s services. In the coming years, used water management will play an even more crucial role as the company extends its used water services to cover more areas and benefit more people in the Province of Laguna.

Used water services include the operation and maintenance of networks of sewer pipelines that collects and conveys sewage to a Sewage Treatment Plant (STP). It then cleans the used water before safely returning it to our water bodies.

In many respects, used water services present even greater challenges than supplying clean, safe tap water. Centralized sewer network systems for a varied population demographics within the Province of Laguna entail huge capital investments and land requirements. Currently, Laguna Water operates STP located at Laguna Technopark, Inc.

As an innovative solution to address the sewage and sanitation needs of its customers at LTI, Laguna Water utilized a Moving Bed Bioreactor (MBBR) Technology to provide high yield treatment with minimal facility land use compared to conventional STP layouts.

Sewage coming out from locators is waste produced by humans which typically contains washing water from sinks, toilets and bathrooms, and other liquid or semi-liquid wastes. These are collected via a network of sewer pipelines that direct sewage flows to an STP.

Treated used water from the STPs meets “Class C” effluent regulations and is safe for discharge to creeks and rivers or recycled for non-contact purposes like toilet flushing, cleaning and irrigation. The STP operates in compliance with existing regulatory standards of the Department of Environment and Natural Resources (DENR) and the Laguna Lake Development Authority (LLDA). Treated used water helps revive the rivers where they are discharged because of their suitability to support aquatic life.