Value set of 3 Standard filters for Barrier Jugs The Standard filter is tested and certified by the Water Quality Association according to NSF/ANSI 42 for the reduction of aesthetic chlorine, taste and odor; NSF/ANSI 53 for the reduction of cadmium, copper, and mercury; and NSF/ANSI 372 for meeting lead content safety guidelines. Threaded filter design prevents untreated water from flowing into the pitcher by creating a water-tight seal and filter from sliding out of place. Made of high-quality plastic for drinking water. Filter Cartridge Components: Coconut-activated charcoal. Unique Silver Impregnated Carbon Technology (USICT) reduces the possibility of bacterial growth within the filter cartridge. Ion exchange resin effectively reduces ions of toxic metals in the water.