Metro Manila's reported October allocation from Angat Dam is 44 cubic meters per second. That is below the regular 50 to 53, but above the 42 that NWRB's director gave on 25 September, and equal to August's 42 base plus a 2 standby. Whether 44 is a cut depends on the baseline, and the formal September and October decisions are still unconfirmed.
Metro Manila's October allocation from Angat Dam is reported at 44 cubic meters per second, per Philstar's 30 September report and a 1 October release from the Philippine Information Agency. Officials tie it to preparation for a very strong El Niño. The regular allocation for the capital's water system is reported as 50 to 53.
The plain answer to the headline: 44 is below the regular range. The best late-September reporting puts the capital at 42, so a base allocation of 44 would be 2 higher, not lower. The formal September allocation, whether August's standby water was actually used, and the final October order have not been confirmed. This piece is about that gap, and about who carries the risk when a forecast, rather than an empty reservoir, drives an allocation.
Philstar reports the October figures as 44 for public use, against a regular 50 to 53, and 20 for irrigation, against a regular 30 to 35. It quotes NWRB Executive Director Sevillo David Jr. saying the board needs to “budget” the supply at Angat to avoid shortages later. The paper describes the El Niño concern as reduced rainfall limiting how much the dam can recover. PIA's 1 October release, in Filipino, reports the Metro Manila reduction from 52 to 53 down to 44, beginning October. GMA News reports that officials are looking at alternative sources, including treatment facilities around Laguna Lake, Cavite and Parañaque.
An earlier report matters more than it first appears. On 25 September, ABS-CBN reported David giving current allocations of 42 cms for Metro Manila (previous 50) and 20 for irrigation (previous 35), in a story about industries being told to recycle water. This piece read that report through a syndicated copy on Thinking Port, because the ABS-CBN page returned no article text. David's quote carried no effective date in that copy. A mid-September MWSS statement putting the capital's drawdown near 42 has been described to this site but was not located.
Reports differ on whether the October decision is final. Philstar and PIA describe it as announced. GMA News and DZME describe the reduction as proposed or possible. This piece uses 44 as the reported figure and has not read an NWRB resolution, which would settle it.
A percentage cut needs a starting point, and the starting point here keeps moving. The table sets the reported 2026 allocations beside the dam's level on the same dates.
| When | Angat level | Metro Manila allocation | Source |
|---|---|---|---|
| Early July | 157.52 m on 7 July, reported then as a historical low | 48 cms | Philstar, 20 July |
| 16 to 30 July | 152.85 m when reported on 20 July | 46 cms, down from 48 | Philstar, 20 July |
| 24 to 26 July | 150.91 m on 24 July, a record when reported; 150.55 m on 26 July, the lowest this piece found | Not reported | Philstar, 25 and 27 July |
| August | 181.87 m on 15 August; minimum operating level 180 m | 42 base plus 2 standby, extended through the end of August. Whether the standby was released is not stated | Philstar, 16 August |
| Early September | Above 200 m in Philstar's 2 September report | Formal September allocation not found | Philstar, 2 September |
| 25 September | 42 as given by NWRB's director, previous 50 | ABS-CBN, 25 September (syndicated copy) | |
| 30 September | 208 m | October: 44, as reported | Philstar, 30 September |
Three comparisons follow. Against the regular 50 to 53, 44 is 12% to 17% lower (arithmetic on the reported figures). Against the 42 reported on 25 September, 44 is 2 higher, about 5%, if the October 44 is a base allocation. Against August's 42 plus 2 standby, 44 matches the potential access, but the report does not say the standby water was released, so the totals cannot be treated as equal use.
So the best-supported reading is that the capital's allocation was already reduced to about 42 before the October announcement, and that the 44 is a modest change from that level, subject to confirmation of the final decision. The reduction from regular is real. What the October news adds is smaller than the headline comparison with 50 to 53 suggests.
Philstar's 25 July report said officials projected Angat would reach only 172.74 meters by the end of October. On 30 September Philstar reported 208 meters. That is not a verdict on the projection, which was made at a record low before August's rain, but it is the reason the October decision cannot be read as a response to an empty reservoir. The 150.91 meters of 24 July was a record when reported; Philstar's 27 July report gives 150.55 meters on 26 July, the lowest value this piece found. The same July report quotes PAGASA officials saying that if Angat does not reach 210 meters by year-end, the capital may face a water crisis next year. Philstar's 30 September report quotes NWRB's David as saying the board is aiming for 212 meters by year-end. So 210 is a PAGASA reference from July and 212 is an NWRB aim as reported by Philstar. Both are reported reference levels, not binding rules.
The logic reported for the reductions, then, is insurance: hold back water now, while the dam is high, because El Niño may reduce the rain that refills the dam. Angat is refilled by rain, and the rainfall forecast is where El Niño enters.
The reported figures are not evenly shared. Against the regular figures, Metro Manila's October allocation is 6 to 9 cms lower and irrigation's is 10 to 15 cms lower, which is 33% to 43% below regular against 12% to 17% for the capital. These are standing differences from the regular rates. Irrigation was already reported at 20 on 25 September, so the October 20 is not a newly imposed reduction.
| Use | October, reported (cms) | 25 Sep (cms) | Regular (cms) | October vs regular |
|---|---|---|---|---|
| Metro Manila water supply | 44 | 42 | 50 to 53 | 6 to 9 lower, 12% to 17% |
| Irrigation | 20 | 20 | 30 to 35 | 10 to 15 lower, 33% to 43% |
Pairing every reported regular figure with every other, irrigation accounts for between 53% and 71% of the combined difference from regular, more than half in every pairing. Over the 31 days of October, the differences from the regular rates amount to roughly 16 to 24 million cubic meters for Metro Manila and 27 to 40 million for irrigation. These are hypothetical differences against the reported regular rates, not an NWRB volume, not water newly withheld in October, and not a measured burden borne by farmers or households.
What this does not show: how the reductions are divided between the two water companies, Manila Water and Maynilad, or what the shares are for hydropower. Philstar's 20 July report notes that Angat also supplies hydropower for the Luzon grid, but none of the coverage read for this piece gives a power allocation. The Manila Bulletin's 1 October headline says both concessionaires guarantee 24-hour supply despite the allocation; the page could not be opened, so only the headline is cited. Per PIA's 1 October release, Presidential Communications Office Undersecretary Claire Castro said there were no reports of an incoming drinking water shortage and asked the public not to hoard bottled water.
NOAA's Climate Prediction Center, in its 10 September 2026 Diagnostic Discussion, kept an El Niño Advisory in place and gave a greater than 90% chance of a very strong event across the Northern Hemisphere fall and winter 2026-27. It gave a 75% chance that the October to December season exceeds every El Niño since 1950, defined as a three-month RONI of +2.5°C or more. The weekly relative Niño 3.4 value for the week centered 23 September was +2.2°C in CPC's relative file.
The rainfall statements are PAGASA's, as reported by GMA News on 23 September and Philstar on 1 October: a strong El Niño now, expected to become very strong between September and December, lasting into early or mid-2027, with reduced rainfall first in about 40 provinces and possibly about 80 by January. Those are the national weather service's statements about the Philippines, and the figures are as GMA reported them. A Niño 3.4 reading describes the Pacific. It does not by itself say how much rain will fall on the Angat watershed, and this piece does not offer a rainfall forecast for it.
El Niño forecasts have started to shape a water decision in the Philippine capital region, so the useful questions are about the decision: what it is measured against, what it costs, and who pays. The number 44 answers none of those until the formal baseline is in hand. For the wider rice and food-security picture, see our rice piece.