Facts about Radiation

Everyone is exposed to some form of ionizing radiation. Average annual effective dose equivalent from natural background radiation (in US) is 3 mSv (300 mrem).

Natural source of radiation

Average Radiation Dose in US

*From Ionizing Radiation Exposure of the Population of the United States, NCRP Report No. 93 (National Council on Radiation Protection and Measurements, Washington DC, 1987).