Electric, Magnetic, and Electromagnetic Fields (EMF) include static fields and low frequency waves, and are categorized as non-ionizing radiation. The guidelines and recommendations for limiting EMF exposure differ from other types of radiation suchas gamma/X-rays or UV/IR lasers. EMF radiation is classified by frequency or by corresponding wavelength.

Safety measures and controls depend on the frequency or field strength of the radiation, and its application. Safety advice for research activities is available. For any questions regarding EMF safety, please contact (650) 723-3201. For questions involving clinical use of MRI, please contact the Stanford Hospital and Clinics Environmental Health and Safety Office at (650) 353-1751.