Angat Dam is approaching minimum operating levels

The water level (WL) of the Angat Dam continues to decline despite the El Niño already being in its weakening phase.

On Monday, the reservoir’s WL was recorded at 180.73 meters, down -0.22 from the 180.95 WL the day before.

The minimum operating level of Angat Dam, which supplies raw water to most areas in Metro Manila and irrigates some agricultural areas in Bulacan and Pampanga, is 180 meters.

“Hopefully, the rains will continue in the catchments so that the level of our reservoir will rise,” said Engr. Patrick Dizon, spokesman for the Metropolitan Water and Sewer System.

“What we (really) need is the rain and the storm to replenish our reservoirs,” he added.

Despite this, Dizon said the WL is still sufficient to meet local demand, but noted that it still needs to be preserved until the rainy season arrives.

WL decrease

Meanwhile, Dizon said isolated rains that occurred on Sunday helped minimize the daily average WL drop in Angat Dam.

“In recent days our reservoir has been reduced by 40 to 50 centimeters per day, but yesterday’s rain has reduced the daily average draw of our water in the reservoir – from 40 to 50 centimeters per day, Angat Dam decreased yesterday by only 16 centimeters,” he said.

In addition, Dizon said the reservoir height of Ipo Dam and La Mesa Dam increased by 5 cm due to the rain.

“Since our reservoirs are already saturated, we expect the water in our reservoirs to increase as rain continues in our watersheds,” he said.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration said last week that the scattered rainfall the country has experienced in recent days could be an indicator of the possible onset of the rainy season.