Presence of organic compounds in drinking water is an important factor in its quality. One of the most important reasons cited for removing organic compounds from drinking water, is their role as precursor in the formation of dangerous side products after disinfection. In this study, removal efficiency of solar photocatalistic degradation of organic matter using immobilized TiO 2 layer coated on the inside surface of traarent polyethylene pipes, which let around 50% of the sun’s UV rays pass through, and also in glass (quartz) pipes packed with glass balls coated with TiO 2 , have been investigated. The aim of this study was to evaluate the efficiency of these systems in removing organic matter from water under different intensity of solar radiation and contact time. When exposed to visible or ultraviolet light, TiO 2 can act as a photocatalist and by releasing hydroxyl free radical and superoxide ion can degrade organic matter. Total organic carbon measurement was chosen as an indicator of contamination. The research was conducted using two different and distinct pilots systems. The first pilot system included three reactors. The first reactor was a traarent polyethylene pipe with immobilized TiO 2 layer coated inside, the second reactor was the same as the first pipe but without the TiO 2 layer, which is used to evaluate the efficiency of solar ultraviolet radiation alone in removing organic matter. The third reactor was a normal opaque polyethylene pipe with TiO 2 coated inside which was used to assess the ability of organic matter removal in absence of sun light. The second tested pilot included 5 columns. The first three columns were traarent pipes made of quartz filled with glass balls coated with titanium dioxide. The fourth column was an opaque quartz pipe which was also filled with glass balls coated with titanium dioxide. The fifth column was a pipe made of quartz which, contrary to the previous pipes, was filled with balls without the titanium dioxide coating. The last two pipes have been investigated as control pipes. In the first stage, the performance of these columns have been investigated using methyl Orange color index. In the next steps, the organic material removals in these tubes have been studied. The concentrations of organic matter were measured by TOC Analyzer Shimadzu device using combustion – infrared method. In the experiment with Methyl Orange Color Index in pilot with polyethylene pipes, traarent pipe with TiO 2 coating decreased the concentration of Methyl Orange from 1 ppm to 0.2 ppm within 8 days. In pilot with quartz pipes, the traarent pipe with balls coated with TiO 2 , due to large contact surface, decreased the concentration of Methyl Orange from 1 ppm to 0.6 ppm within 4 hours.