Health effects associated with exposure to VOCs include, but are not limited to, irritation of the eyes, nose and throat, damage to the liver, kidney, and central nervous system, and cancer. Certain SVOCs are classified as endocrine disruptors, immunotoxicants, neurotoxicants, and carcinogens. Traditionally, researchers have focused on the presence of VOCs or individual classes of SVOCs. However, few studies have investigated a broad range of chemical compounds in indoor air, and the influences of consumer and household behavior, and geographic location in the United States.