Reverse osmosis drinking water (RO water) has become one of the most prevalent home water purifier systems in the marketplace ever since the first debut in the 1970s. RO drinking water has its health advantages as well as disadvantages. The major health benefit of reverse osmosis drinking water as compared to tap water is that able to remove 99.9% of contaminants from the water. Such filtration system can enhance the taste, odour and appearance of water.