GAC has a tremendous adsorption capacity for a long list of organic (man-made) pollutants. Herbicides, Pesticides, Insecticides, and other volatile organic compounds (VOC) are adsorbed with a properly designed system. Contact time is critical for the removal of these pollutants. The main health benefit GAC systems offer when installed on the entire water supply is in the area of skin absorption. A study performed by three (3) toxicologists in Boston for the Dept. of Environmental Quality (DEQ) in Boston, MA and reprinted in the American Journal of Public Health proves that taking a fifteen (15) minute bath and drinking a half gallon of the same water, more carcinogens enter the body from the 15 minute bath. GAC can protect your family from this “toxic bath” phenomenon.GAC has a lifespan. Depending on the incoming water quality, volume of filter, and the consumption will determine the frequency of change of the filter.All GAC Filters should easily remove taste and odor.