Fecal sludge that is not managed properly has a potential to contaminate residents' water sources. Thus people need proper information regarding safe septic tank construction in settlement to prevent pollution. " A safe septic tank should be water proof, thus waste water doesn't seep into the ground"PD. PAL Jaya President Director, Subekti assessed, waste water pollution can be prevented start from checking septic tank in our house. "A safe septic tank should be water proof, thus waste water doesn't seep into the ground. Besides, it needs to be equipped with control hole and air ventilation," he said, Tuesday (1/28). He continued, septic tank should also have inlet and outlet pipes. Importantly, it should be desludged at least once every three years. "PD. PAL has Waste Water Treatment Plant in Duri Kosambi where we treat waste water professionally," he mentioned. Every time he has an opportunity to meet with residents, PD. PAL Jaya always socialize about the safe septic tank to them. "We always tell them about safe septic tank thus more people know about it," he closed.