STATUS OF WATER RESOURCES IN THE ANGAT RESERVOIR
January 3, 2021
The National Water Resources Board and its partner agencies involved in the management of the Angat Dam — PAGASA, NAPOCOR, NIA, MWSS and its concessionaires, and Angat Hydro Corporation — encourages the public to wisely use our water resources and conserve water whenever possible this year. This is to ensure that sufficient water is available for municipal, irrigation and hydropower uses in the subsequent months, particularly during the summer season.
As of December 31, 2021 at 12 midnight, the Angat Dam elevation is at 202.80 meters which is 9.20 meters below the normal high water level (NHWL) of 212 meters. There was a slight increase in the water level with some rainfall brought about by the northeast monsoon but not adequate enough to fill the dam near its ideal year end elevation. The country’s weather bureau, PAGASA, forecasted that the occurrence of La Nina phenomenon which started last October 2021 will continue to persist until March 2022. Rainfall could be enhanced by the northeast monsoon from January to February which could provide more precipitation. This could bring near normal rainfall in the Angat watershed area in the first semester of this year.
With the current status of Angat Dam and the forecasted rainfall in the watershed, the dam may reach its minimum operating level of 180 meters in the middle of April 2022. Water level projections for the first semester of 2022 show that there is sufficient water supply until the onset of the rainy season by the middle part of the year. However, there is a need to manage the releases from the dam as a precaution for any significant changes in the projections.
NWRB and its partner agencies are implementing several mitigating measures to sustain water availability and to ensure adequate water supply for Metro Manila and its adjoining provinces as well as for the irrigation areas in Bulacan and Pampanga. The situation is closely being monitored by the said agencies and the public will be informed of further developments.