Activated carbon is the not-so-secret ingredient to PUR water filters. The carbon absorbs organic compounds and pollutants.
PUR activated carbon filters are made from coconut shells, which are 'heat treated' with steam. This produces pores within each grain of carbon, creating tiny tunnels and spaces, 1,000 square meters of surface area per gram of carbon.
That's approximately 200,000 sq. ft. of nooks and crannies to absorb and trap the contaminants in your tap water in each PUR faucet filter.