Organochlorine pesticides are man-made organic chemicals. DDT was the first that was used on a large scale in the U.S. The Second National Report on Human Exposure to Environmental Chemicals measures metabolites, or chemicals created by the body's defenses acting on a parent compound, of DDT, such as DDE. Many organochlorine pesticides are extremely persistent in the environment and in people's bodies. Although most are no longer used in the U.S., many are manufactured here for use elsewhere, especially in developing countries. Scorecard provides information for organochlorine pesticides as a class as well as for several of the individual chemicals. For information on health effects and facilities that emit these chemicals click on the appropriate links below. CDC's biomonitoring results for organochlorines are available at http://www.cdc.gov/exposurereport/pesticides/organochlorine/default.htm.