Pre-filter removes sediments and cloudiness from water. Reverse osmosis pre-filter removed more than 99% of chlorine and chloramine which can damage the filter. Removes odours and conditions the water. Reverse Osmosis Membrane removes barium, chromium -6, copper, fluoride, iron, lead, radium and more. Activated coconut shell carbon V.O.C filter: removes toxic organic chemicals, which ensures great tasting water. Removes herbicides, pesticides, fuel additives, industrial solvents, rocket fuel and more.