- Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population
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▪ TableEstimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. populationsource of radiation average dose rates (mSv/year)Naturalenvironmentalcosmic radiation 0.27 (0.27–1.30)*terrestrial radiation 0.28 (0.30–1.15)**internal radioactive isotopes 0.36subtotal 0.91Man-madeenvironmentaltechnologically enhanced 0.04global fallout 0.04nuclear power 0.002medicaldiagnostic 0.78radiopharmaceuticals 0.14occupational 0.01miscellaneous 0.05subtotal 1.06total 1.97*Values in parentheses indicate range over which average levels for different states vary with elevation.**Range of variation (shown in parentheses) attributable largely to geographic differences in the content of potassium-40, radium, thorium, and uranium in the Earth's crust.See as table:
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Universalium. 2010.