Water is one of the components of the environment that is very important for development and growth, not only for humans but also for other living things. The problem of clean water is something that is often encountered by people who need clean water for their daily needs. The limited amount of water is not proportional to the number of consumers, causing a clean water crisis. The adverse effects caused by consuming polluted water are diarrhea, cholera, polio, and poisoning. Diarrhea is one of the most common diseases caused by water pollution. Diarrhea can result in dehydration and death for children. An equally serious impact is poisoning caused by water pollution through waste. Sufferers will experience anemia and hypertension to disrupt the nervous system. Therefore, an effective clean water treatment method is needed, one of which is the filtration method. Filtration can also be considered as a water treatment method that is clean, affordable and can be used by the community directly. Most of the media used in the water treatment process is activated carbon. The media has good capabilities but is not economical. In this study, it was found that sand and clay proved to be effective for treating dirty water into clean water, with the result that filtration using sand and clay media was able to normalize 95% of the pH by 7 with a predetermined thickness of sand and clay so that it complies with clean water requirements according to RI Minister of Health No. 907/MENKES/VII/2002 with predetermined pH parameter values.