What is Radon?
Radon is a natural radioactive gas, which enters buildings from the ground.
Exposure to high concentrations increases the risk of lung cancer.
United Kingdom Health Security Agency (UKHSA) recommends that radon levels should be reduced in homes where
the annual average is at or above 200 Becquerels per cubic metre (200 Bq m-3).
This level is termed the Action Level.
United Kingdom Health Security Agency defines radon Affected Areas
as those with 1% chance or more of a house having a radon concentration at or above the Action Level of 200 Bq m-3.
Indicative Atlas of Radon in the United Kingdom
The joint UKHSA-BGS digital
Indicative Atlas of Radon in the United Kingdom presents an overview of
the results of detailed mapping of radon potential, defined as the estimated percentage of homes in an area above the radon Action Level.
The Atlas presents a simplified version of the Radon Potential Dataset for the United Kingdom with each 1-km grid square being classed according
to the highest radon potential found within it, so is indicative rather than definitive.
The joint UKHSA-BGS digital Radon Potential Dataset for the United Kingdom provides the current definitive map of radon Affected Areas in the United Kingdom.
Indicative Atlas of Radon on the Isle of Man
The UKHSA Atlas of Radon on the Isle of Man presents an overview of the results of detailed mapping of radon potential, defined as the estimated percentage of homes in an area at or above the radon Action Level.
The Atlas is presented at 5-km grid square and provides a definitive answer to the radon Affected Area status.