The Association of Public Health Laboratories (APHL) collaborates with laboratory and public health partners to assure effective monitoring, detection and response to health threats. APHL’s core membership is comprised of state and local governmental health laboratories in the United States, including public health, environmental laboratories, agricultural science and food safety laboratories. Public health laboratory analysis is critical to monitoring and prevention of radiological terrorism. Public health laboratories analyze clinical and environmental samples for radiochemicals and radiological contaminants, monitor the effects of radiation exposure, and confirm radiation sickness or genetic mutation. Radiological response work is led by the environmental health program at APHL.