Certified to NSFANSI 58 6Stage Alkaline Remineralization Layered Filtration Exclusively designed to restore the natural alkalinity and mineral balance of water this reliable and ultrasafe Reverse Osmosis RO water filtration system converts your water into clean pure and healthy drinking water by removing up to 99 of over 1000 harmful contaminants like chlorine fluoride lead removes up to 98 arsenic asbestos calcium sodium and more