Reverse Osmosis (RO) is the most economical method of removing 90% to 99% of all contaminats. The pore structure of "RO" membranes are Cabales of >300 Daltons molecular wight (Including Pyrogens). Infact reverse osmosis technology is used by most leading water bottling Plants.Natural Osmosis occures when solutions with two diffrent concentration are seprated by a semi-permeable membrane.Reverse Osmosis is highly effetive in removing several inpurities from water scuh as total dissolved solid (its), turbidity. asbestos lead, and other toxic heavy metals, radium and many dissolved organics. The Process will also remove chlorinated pesticides and most heavyier-weight volatile Organic Comound. Reverse Osmosis and activated carbon filtarion are complementry process. Combining them results in the most effectiv treatment against the broadest range of water impurities and contaminates."RO" is the most economical and efficient methoed for purifying tap water if the system is properly designed for the feed water conditions and the intended use of the product water. "RO" is also the optimum pretreatment for reagent-grade water polishing systems.