You may be wondering how and why drinking water filter systems impact you and your life. Well, it is common knowledge that a person needs plenty of water each day to survive. In fact, our bodies are made up of seventy percent water. That is a lot of water and when you really stop and think about it, you lose water regularly. For example, we all sweat and we all use the restroom, what this means is that we are losing water. We have to replace what we have lost by drinking more water.