The UK Health Agency (UKHSA) and the British Geological Survey (BGS) have published an updated map showing the areas of the UK most affected by radon. Radon is a colorless, odorless gas produced by the radioactive decay of small amounts of uranium found in all rocks and soils.

It is responsible for 1,100 deaths from lung cancer in the UK each year. The risk is higher among smokers and ex-smokers. For most people, the risk of developing lung cancer from radon exposure remains low and radon levels have not increased in the UK.

However, the UKHSA recommends that you have your home checked if you live or work in an affected area. There are several methods to reduce high levels of radon in buildings. The interactive map shows higher concentrations of potential radon exposure in some parts of Wales compared to other areas of the UK.

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The south and south-east of England, including London, have low radon levels, while parts of north and west Wales appear to have relatively high levels, highlighted in dark red.

According to the UKHSA, this is because Wales has a porous geological structure, meaning it is easier for underground radiation to penetrate the surface. Other parts of the UK may have denser geological structure such as clay, meaning it is more difficult for underground radiation to reach the surface.



For most people, the risk of developing lung cancer from radon exposure remains low.

The map does not indicate actual radon, but it does show the potential worst case scenario based on several factors. The results of radon level measurements in homes are combined with knowledge of basic geology. The agency recommends that homeowners, homeowners, and business owners have their radon levels tested if they are in an affected area.

Tracey Gooding, Chief Scientist for Radiation Protection at the UK Health Safety Agency, said: “While the vast majority of buildings remain outside radon-affected areas, if your property is in a radon-affected area, it is important organize testing. If you live in private or rented social accommodation, talk to the landlord who should arrange testing for you. Employers can use this map to help make a proper and sufficient risk assessment and take appropriate action if necessary. The updated map provides information that allows landlords, landlords and employers to make informed decisions about the merits of radon measurements and potential remediation efforts.”



West and South Wales



north wales

Russell Lawley, chief geologist at the British Geological Survey, said: “Radon is found in all rocks and soils. Using a revised statistical approach to mapping UK geology has allowed us to model where in buildings this geological hazard is most likely.

“This map is a major update to the previously published version and will help raise awareness of this geological hazard.” The interactive map can be seen here. Additional information on methods available to reduce elevated radon levels is also available here.

Source: Wales Online