For over 80 years, Culligan's water filtration systems have improved water quality for thousands of families worldwide. Culligan filters reduce up to 50+ impurities including lead, asbestos, mercury, chlorine taste & odor, 8 pharmaceuticals, and cysts*. Culligan filters reduce chlorine taste & odor for better tasting water and ice. They provide safter, purer water by also reducing select pharmaceuticals including ibuprofen, atenolol, and trimethoprim. Additionally, most Culligan filters reduce the presence of illness-causing, waterborne parasites, like Giardia and Cryptosporidium, helping you stay healthy when you hydrate. Culligan filters have an activated carbon cartridge that absorbs the carbon-based VOCs (volatile organic compounds) as they pass through the filter, resulting in better water. Culligan filters are produced and assembled in the U.S. and provide a compatible refrigerator fit that's easy to install and replace every 6 months. Culligan filters are certified by IAPMO R&T against NSF/ANSI 42, 53, and 401 for the reduction of claims specified in the performance data sheet*. * For complete list of Culligan filters and impurities reduced, see manufacturer's performance data sheet or website for full contaminant reduction information. Substances reduced are not necessarily in all users' water.