FCRC15B is a whole house water filter cartridge constructed of FDA grade materials and filtration media. As the second stage of iSpring 2-stage high capacity whole house water filtration system, FCRC15B lead removal filter is specially designed for reducing lead. This filter features a high filtration capacity of 80, 000 gallons of lead-loaded water, effectively reducing lead level from as high as 100 ppb(average lead level found in Flint, Michigan) to 15 ppb (the EPA standard for drinking water) and less. Other heavy metals reduced by the FCRC15B whole house filter include potassium, cesium, magnesium, calcium, strontium, barium, radium, chrome, manganese, iron, nickel, copper, silver, zinc, cadmium, mercury, aluminum, and tin.