About 900 barangay (villages) in Metro Manila and Cavite will have no water from 9 p.m. to 4 a.m. beginning Wednesday next week as utility concessionaire Maynilad Water Services will start implementing supply interruptions on Wednesday next week.
Maynilad on Friday said the move is meant to ease the pressure off Angat Dam.
It said the move would affect 56 percent of its customer base.
The scheduled water interruption may stretch to other areas should the National Water Resources Board (NWRB) lower its water allocation to Maynilad and Manila Water.
Manila Water customers may expect weaker water pressure from 10 to 11 p.m. to 4 to 5 a.m. by September 21, though they will continue to have an uninterrupted water supply as long as the Ipo Dam is stable.
Maynilad is plotting a specific supply interruption schedule per area to ensure that affected customers will have water within a limited supply window.
But during the first week of implementation, these schedules will not yet be adopted as Maynilad strives to limit the service interruption during off-peak hours.
“At this initial phase of system adjustments, we shall implement the supply interruptions daily from 9 p.m. to 4 a.m. only,” Ronaldo Padua of Maynilad said.
Padua explained that this off-peak schedule will be gradually extended until, at full implementation, they will adopt the different supply interruption schedules for each area.
He clarified that although recent rains at the Ipo watershed helped maintain its water elevation and augmented the reduced allocation from Angat Dam, the supply at Ipo Dam is not enough to sustain the company’s water production for the long term.
Padua said the Ipo Dam is only a diversion control dam and has a small capacity–5.9 million cubic meters versus Angat Dam’s 850 MCM.
“So it is barely enough to meet Metro Manila’s water requirement for two days,” he added.
In preparation for the full implementation of the rotating service interruptions, Maynilad is acquiring additional water tankers and refurbishing its stationary water tanks to serve those areas that are expected to have less than 12 hours of water supply.
Maynilad is an agent and contractor of the Metropolitan Waterworks and Sewerage System (MWSS) for the West Zone of the Greater Manila Area which comprises parts of Manila, Quezon City, Makati City, Caloocan City, Pasay City, Parañaque City, Las Piñas City, Muntinlupa City, Valenzuela City, Navotas City and Malabon City–all in Metro Manila — and the cities of Cavite, Bacoor and Imus, and the towns of Kawit, Noveleta and Rosario in Cavite.