Eight-to-twelve-hour water service interruptions in Metro as Angat nears critical level

Residents in the East Zone of Metro Manila will experience eight to twelve hours of rotational water service interruptions at night as the level in Angat Dam nears critical level, its concessionaire said on Tuesday.

The Manila Water Co. Inc. will implement the new scheme after the National Water Resources Board (NWRB) further reduced its allocation to the Metropolitan Waterworks and Sewerage System (MWSS).

“The National Water Resources Board has announced it will reduce allocation to the concessionaires from the current 46 cubic metres per second (CMS) to 40 CMS to fine-tune the preparation of the low-level outlet (LLO) as water level in Angat Dam nears its critical level of 160 metres,” Manila Water said in a statement.

“This will affect water supply going to our treatment plants and consequently, our ability to refill our reservoirs,” it said.

The level in Angat Dam, the primary source of water in Metro Manila, was recorded at 161.78 metres, a 0.61 metre-drop from the previous day, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa).

Pagasa hydrologist Sonia Serrano said the dam may hit the 160-metre critical mark in the next few days as rainfall remained insufficient in the area.

Citing previous records, Serrano said the level in Angat dam would drop in June but was expected to climb in July when there would be more sustained rain.

The Manila Water Company is the sole provider of water and wastewater services to more than six million people in the East Zone of Metro Manila.

These service areas are in Makati (except southwestern portion), Mandaluyong, the South-eastern portion of Manila, Marikina, Pasig, Pateros, Central and Eastern parts of Quezon City, and San Juan.