R ainwater should be used instead of drinking water, but the quality of rainwater on the roof is affected by the environment. Kota Bambu Selatan urban village officein Palmerah, West Jakarta, has a planned rooftop waterway and storage tank forwater supply. Analysis of reservoir rainwater exceeding the quality standardPerMenKes492/2010 (drinking water) yielded three parameters: turbidity (6.45NTU); chlorine (42.54 mg/l); and E-coli (120/100ml sample). Based on availableliterature from journals and papers, these parameters can be treated with sand andactivated carbon. Therefore, the purpose of this final project is to analyze the filter’smedia variation associated with the three parameters and determine the final designof the reactor. To achieve this goal, a conventional design reaction in which thethickness of the medium changes in the form of activated carbon (20, 25, and 30cm), silica sand (30, 35, and 40 cm) and gravel (15 cm). Processing using up flowand rapid sand filter with a filtration speed of 4,796 m3/m2/hour (4 – 15m3/m2/hour), so the processing becomes faster. Analysis of variability using the Ftestusing bar charts and the t-test (one-way analysis of variance) and SPSS(Statistics Package for Social Sciences). The results obtained from the SPSSapplication are t count < t table and F count > F table, so there is an effect of mediathickness on the test parameters. The highest efficient values of the three parametertests were 91.78%, 99.53%, and 100% with the most effective thicknesses ofcharcoal and sand being 30 and 40 cm. Placement of the reactor requires a total areaof 1.14 m2 with a total RAB required of Rp. 4,047,500.00 for water treatment of0.849 m3/hour. Key Word : Up Flow