Guidance
Ionising radiation: dose comparisons
Comparison of doses from sources of exposure.
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Every day all over the world people are exposed to ionising radiation, almost all from natural sources in the environment or for medical reasons.
Updates to this page
Published 18 March 2011
Last updated 28 September 2026
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UK average annual radiation dose updated from 2.7 mSv to 2.6 mSv.
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First published.