Feel confident with every sip that you are providing the best quality water for you and your family. The Aquifer® reverse osmosis (RO) water filtration system effectively reduces contaminants including arsenic, fluoride, TDS, bacteria, virus, lead, mercury, chlorine, and pharmaceuticals in your cold water. This sediment pre-filter reduces dirt, sand, and rust as part of the Aquifer® reverse osmosis four-stage filtration system.