The method of reverse osmosis is the process by which the concentrate water passes through a series of pre-filters to remove large total dissolved solids and chlorine. It then is forced through semipermeable filters which removes virtually everything except hydrogen and oxygen. Once the permeate water exits the RO it will come into contact with Ozone.
Ozone is 100% effective at eliminating microbiological contamination.
The end result is Premium Purified Water.