The Water You Drink Should Be Cleaner. We recommend drinking at least 2 liters of water a day. Our body is made up of 60 percent water and that your brain is approximately 75 percent water. Water is so important to us. But, the tap water you used every day is clean? Possible contaminants: arsenic, atropine, lead, mercury, volatile organic compounds, chlorination byproducts and chromium-6, etc.Potential health problems: cancer, hypertension, stomach discomfort, plus liver, kidney or central nervous system problems and other health conditions or diseases. So, you need a solution and a faucet water purifier can help you to solve this problem.