This Ice and Water Refrigerator Filter is NSF Certified to reduce more contaminants including trace amounts of pharmaceuticals from drinking water. Reduces 16 contaminants including pharmaceuticals, metals, minerals, pesticides, cysts, industrial chemicals, Class I Particulates and Chlorine. Each filter provides 200 gallons of filtered water and should be changed every 6 months to ensure proper contaminant removal and flow rate. The filter removes impurities from water and ice, and it also reduces the taste and smell of chlorine. The filter is easy to install and replace, and it is backed by a one-year warranty.