Center of Disease Control and Prevention (September 2017 to March 2019) Contract 200-2017-95482. The mission of the Centers for Disease Control and Prevention (CDC), National Center for Environmental Health (NCEH) is to promote health and quality of life by preventing or controlling those diseases or deaths that result from interactions between people and their environment. The mission of the Agency for Toxic Substances and Disease Registry (ATSDR) is to serve the public by using the best science, taking responsive public health actions, and providing trusted health information to prevent harmful exposures and disease related to toxic substances.