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Abstract. Cibinong WTP using raw water sources from the Ciliwung River. Processed water from the Cibinong WTP serves 5 sub-districts, namely, Tajur Halang District, Bojong Gede, Cibinong, Babakan Madang and Citereup. The research covered raw water quality, evaluation of the existing installaition condition and optimization of work of operation unit and installation process. Cibinong IPA uses unit intake, hydraulic coagulation, hydraulic flocculation, sedimentation plate settler, rapid sand filtration, and ground reservoir. The coagulant used is 1% alum with a dose of 25 mg / L and disinfectants that use liquid gas and chlorine at a dose of 2 mg / L. Specifications for installation of drinking water installations use standards that are in accordance with SNI 6774 in 2008 concerning procedures for processing plant package units. water and water quality in accordance with the Minister of Health Regulation 492 of 2010 concerning drinking water quality requirements. CibinongWTP has several units that have not met the 2008 SNI 6774 standard but, the quality of the water already in accordance with the regulation of Minister of health no 492/2010.