The Comparison of Brackish Water Treatment Using Local Filter Materials and Reverse Osmosis Filters

Water is an important resource in human life. The Indonesian Central Bureau of Statistics in 2020 noted that it has access to clean water up to 90.21%. However, these data show that there has not been equal access to clean water in
Indonesia. Therefore, this research focuses on the area of Tegal Sari Hamlet, Kupang Village, Jabon District, Sidoarjo Regency, East Java Province, where the area has problems with brackish well water. The purpose of this underway research
is to find a comparison that occurs in brackish water treatment when using a filter made of local material with a Reverse Osmosis (RO) device from the market. This research used an experimental method, to determine the effect of treatment on
the test object. The treatment that is carried out is by flowing water through the filter from local material / RO to make the water meet the existing standards of pH, TDS, and EC. The outcomes demonstrate that the comparison using local materials
and RO according to pH, meet the requirement. Then, concerning TDS and EC measurements is reducing 51.5% and 91.9%, as well as a decrease of 52.16% and 91.3%. respectively. This research is still underway condition, the appropriate
local material and suitable method are key for successful research in the future. Thus it can be suggested that in carrying out brackish water treatment can be used an RO device instead of using a local material filter considering the results obtained.