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Balibago Waterworks System, Inc. (BWSI) is a privately owned company established in May 20, 1958 by the Santos family of Porac, led by Mr. Eladio Santos or “Apung Adiong” to the old-timers of BWSI. Its primary purpose was to acquire, establish, develop, manage and operate an effective waterworks utility system within its franchise area of 900 hectares composed of Barangay Balibago in Angeles City and Barangay Dau in the town of Mabalacat. The corporation started operations in 1958 at its present site in Balibago, Angeles City. On June 22, 1963, the Congress of the Philippines granted BWSI a Congressional Franchise for 50 years as embodied in Republic Act. No. 3647 to operate exclusively within designated areas a waterworks system. It was also granted a Certificate of Public Convenience (CPC) in the same year.