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Manila Bulletin devider Philippines devider National devider La Mesa Dam still overflows; 3 Luzon dams continue to release water due to rains

La Mesa Dam still overflows; 3 Luzon dams continue to release water due to rains

Published Jul 22, 2025 10:15 am
La Mesa Dam (Manila Bulletin File Photo)
La Mesa Dam (Manila Bulletin File Photo)
La Mesa Dam in Quezon City continued to overflow as of 9 a.m. Tuesday, July 22, with its water level reaching 80.17 meters, based on the latest monitoring from the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA).
The dam, which has no spillway gates, automatically overflows when water exceeds the spilling threshold of 80.15 meters.
PAGASA warned that water from the dam may affect low-lying areas along the Tullahan River, particularly parts of Quezon City, Valenzuela City, Caloocan City, Malabon City, and Navotas City.
Residents in these areas, especially those near riverbanks, are advised to take precautionary measures.
Unlike La Mesa Dam, which lacks a gate system, Ipo, Ambuklao, and Binga Dams are equipped with spillway gates that regulate water releases.
As of 8 a.m. Tuesday, all three dams continued to release water following sustained rainfall.
Ipo Dam in Bulacan had a water level of 100.28 meters, slightly below its normal high level of 101.1 meters, with one gate currently open.
Ambuklao Dam in Benguet recorded 751 meters, slightly under its normal high of 752 meters.
Three gates are still open but down from four on Monday, July 21.
Binga Dam, also in Benguet, which has a normal high of 575 meters, had a water level of 572.66 meters.
Three of its gates remained open, reduced from six the previous day.
Ambuklao and Binga are part of a cascading system that drains into San Roque Dam in Pangasinan.
Although San Roque’s current water level remains low at 246.61 meters, well below its normal high of 280 meters, PAGASA advised communities downstream to remain on alert, as water releases from upstream dams may still increase the risk of flooding.
Areas at potential risk include Barangay Ambuclao in Bokod, and Barangays Dalupirip and Tinongdan in Itogon, Benguet.
PAGASA also reported rising water levels in other major dams across Luzon, though none have reached their normal high water levels as of Tuesday.
Angat Dam in Bulacan rose from 195.71 meters to 198.11 meters, which is below its normal high of 210 meters.
Pantabangan Dam in Nueva Ecija increased from 193.5 meters to 194.11 meters, remaining below its normal high water level of 216 meters.
Magat Dam also rose slightly, from 184.42 meters to 185.03 meters, short of its 190-meter spilling level.

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PAGASA LA MESA DAM OVERFLOW HABAGAT SOUTHWEST MONSOON
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