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Public and professional information on radon gas.

Radon is a naturally occurring radioactive gas that seeps out of the ground. Radon comes from uranium which occurs naturally and is widespread in all rocks and soils. It has no colour, taste or smell.  

The amount of radon in the ground depends on the rock beneath, and each area is affected differently.

Radon levels will vary between neighbouring buildings and from room to room according to their location below or above ground level, size, design and usage. Basement rooms may have higher levels.

Is radon dangerous?

The main danger from high exposure is the increased risk of lung cancer. For most people, radon is the single largest source of radiation exposure whether they are at home or at work.

Your home may be in an area affected by radon. To find out and whether you need to take action to reduce your exposure, visit the UKradon website (external link) 

Reducing radon levels in schools

We are working with local authorities, foundation and voluntary-aided, and independent schools in Wales to inform them of the risk of radon exposure. We have advised them of their duty as employers to assess radon levels and take action where required.  

For further information go to the Health and Safety Executive website (external link)

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