The original waterworks system was constructed in 1922-1924 with Ikloy Spring as its source and covers only the Poblacion. The system consists of a spring chamber, pumphouse with hydro turbine prime over and centrifugal pump, ground reservoir, 2 km transmission pipelines and distribution facilities. In 1980, a separate distribution pipe and ground reservoir in "Barangay Kaytambog" was included in the system. Total registered concessionaires were 463 as of August 1980. Water production from the spring source is 580 cubic metre of which only 26.6 percent is accounted for. The total water demand for various design years is derived from the demands for domestic, commercial, institutional and public faucets demands including an allowance for leakage and wastage. The possible sources of water supply for Indang are springs, namely, Ikloy, Ipie I and Ipie II. All the springs emanate from fissures on the contact between permeable pyroclastics and impermeable tuff above the river course. The full production of Ikloy Spring alone is estimated to meet the water demand of Indang Water District.