Angat Dam is a concrete water reservoir embankment hydroelectric dam that supplies the Manila metropolitan area water. It was a part of the Angat-Ipo-La Mesa water system. The reservoir supplies about 90 percent of raw water requirements for Metro Manila through the facilities of the Metropolitan Waterworks and Sewerage System and it irrigates about 28,000 hectares of farmland in the provinces of Bulacan and Pampanga.
Angat Dam is located in Barangay San Lorenzo (Hilltop), Norzagaray, Bulacan. It supplies potable water to Metro Manila and powers a hydro-electric power plant. The dam is 131 meters high and impounds water from the Angat River that subsequently created the Angat Lake. Angat dam has a normal high water level of 210 meters, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa). It has three gates opening a total of 1.5 meters to gradually release water that had accumulated due to incessant rains during typhoons. In comparison, Ipo Dam, which is downstream from Angat dam, has three gates and the 100.8 meters is its normal high water level. Ambuklao dam on the other hand, has two gates with the normal high water level (NHWL) of 752 meters. Binga dam which sits downstream from Ambuklao has three gates and the NHWL of 575 meters. San Roque dam, which was receiving water from Ambuklao and Binga, has the NHWL of 280 meters. Angat dam supplies potable water and energy to Metro Manila and nearby areas. Surrounded by lush greens, this place is also ideal for fishing, boating and hunting.