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Information on radon

Radon is a colourless, odourless radioactive gas formed by the decay of small amounts of uranium that occur naturally in all rocks and soils. It has the potential to enter into building structures, especially confined spaces, such as basements. A long-term exposure to the gas is linked with health issues such as lung cancer.

Testing for radon

Public Health England (PHE) recommends protective measures be installed in a property if a concentration of 200 becquerels per cubic metre (200 Bq m-3) is reached indoors. To test for radon, see the links below. PHE provides resources and advice about radon for the public and has produced radon maps showing areas in England and Wales that may be affected by the gas.