Culligan’s water filtration systems have improved water quality for thousands of families worldwide. Culligan filters reduce up to 19 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 fresh 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 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.