A safe drinking water is essentials for human life. Nevertheless, the water purification is also quite important and complementary for water use. However, the polluted water and dirty was found in Batang Kuis, Deli Serdang district, North Sumatra. The groundwater is colored yellow and odor so it is not worth for consuming. Thus, students from Faculty of Biology, University Medan Area conducted a research in regard to the clean water filter. The clean water filter is created with cheap and simple materials including: fibers, activated carbon, sand, gravel and bricks. The process of purification also is quite simple, it starts with arrange the materials in layers into a paralon pipe. The pipe is designed with length of 1 meter and 4 centimeters for its diameter. The process of water purification is be held on the pipe, then the clear water is streamed through other pipes.

After going through the purification process, the water color is change and also drinkable after been cooked. Mufti Sudibyo as the mentor said that this water filter has been socialized and given the counseling to the society and expected to be used in sustainable.