Filter lasts 2 months (Approximate timing based on 40-gallon filter life and average family usage of 11 glasses per day.) (40 gallons). Reduces chlorine (taste & odor), mercury, copper and more. Works in all Brita systems except stream. Transform Your Water: Transform ordinary tap water into cleaner, great-tasting water and replace up to 1,800 bottles per year (vs. tap. Based on the use of 6 Brita standard filters per year. One filter can replace up to 300 - 16.9 oz. water bottles). Filter replacement is essential for product to perform as represented. Pull-top cap for easier insertion and removal. Built-in mesh screens prevent black flecks. Patented aeration design ensures consistent flow of water. Activated carbon reduces chlorine (taste and odor) and mercury. Ion-exchange resin captures copper and cadmium in your water. Get to the good stuff - What we filter out. The Brita Water Filtration System with standard filter reduces the following impurities that may be in your tap water: Heavy Metals - Copper, mercury, cadmium; Taste and Odor - Chlorine. The Brita standard filter keeps a healthy level of fluoride, a water additive that promotes strong teeth (applies to fluoridated municipal tap water). The contaminants or other substances removed or reduced by this water treatment device are not necessarily in all users' water.