Material and Life Service of the Septic Tank Have an Influence on the Biological Pollution of Groundwater (Case Study Kelurahan Pademangan Barat, North Jakarta)

The type of septic tank material used can vary but must be impermeable to water. Septic tanks made of cast concrete but at the bottom are not cast and deliberately made seepage should not be used because they pollute from its seepage. The use of this particular material also directly impacts the service life and affects the performance of the septic tank even though there is no standard regarding its usage time limit. This research aims to identify the use of material and life service of the septic tank in Kelurahan Pademangan Barat, which is the area with the highest biological pollution of groundwater in the study conducted by BPLHD in 2015. The results of this research identified more than half of the respondents, as many as 65.99%, used septic tanks with partially cast concrete, 33.31% usefully cast material, and the rest from other types of materials. The highest yield was 29.60% had septic tanks that were more than ten years old. The rest is as much 22.66% not knowing the service life, 19.16% with service life 5-10 years of use, 11.53% with 3-5 years of use, and 17.06%, which are less than three years old.