Many people in the United States drink tap water, however in other parts of the world this is a major no-no for a variety reasons. And, it really is not that great of a choice in the United States either. The reason why that is there are so many different things in the water that you just do not know what you are drinking. But, if you like the convenience of the tap water then you may choose to simply use water filters. It is so convenient to use water filters because you can have water on hand at all times of the day and night when you need it. And, there are so many options available to you. You can even use shower filters so that your bath water is purified and perfect for bathing. Many of the home systems are reverse osmosis systems. This might sound confusing or difficult but it simply means that the water is cleaned as it moves through the system and the good stuff passes through and the not so good stuff gets stuck in the filter. So, that is why reverse osmosis is used in water filters because it allows the water to get clean and purified.