The NWRB lowered the water allocation for Metro Manila to around 44 to 46 cubic meters per second in October from the usual 50 to 52 cubic meters per second. Link to the full story in the comments section. | via ANC 24/7 - Facebook. The NWRB lowered the water allocation for Metro Manila to around 44 to 46 cubic meters per second in October from the usual 50 to 52 cubic meters per second.