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Radon

General

Radon is a naturally occurring radioactive gas that originates from the decay of uranium in rocks and soils. It is colourless, odourless and tasteless and can only be measured using special equipment. When radon surfaces in the open air, it is quickly diluted to harmless concentrations, but when it enters an enclosed space, such as a house or other building, it can sometimes accumulate to unacceptably high concentrations.  Radon decays to form tiny radioactive particles, some of which remain suspended in the air. When inhaled into the lungs these particles give a radiation dose that may damage cells in the lung and eventually lead to lung cancer.

Scale of the Radon Problem in Ireland

On the basis of a nationwide survey of radon in domestic dwellings, the RPII have estimated that there are some 91,000 houses in Ireland with Radon concentrations in excess of 200 Becquerels per cubic metre.   This is the reference level above which the government recommends that householders should consider carrying out remediation measures. 

The RPII have produced a map showing higher Radon areas around the country.  This can be found on their website www.rpii.ie.

Preventative Measures

Since July 1998, all new dwellings and long stay buildings are required to incorporate some degree of radon preventative measures at the time of construction in accordance with the revised Building Regulations. The degree of protection required is dependent upon whether the site is located within a high or low radon area.

This Department's publication, Radon in Existing Buildings - Corrective Options: gives information to building designers and householders about measures they can take to reduce high radon.

Radon Measurement Service

The RPII, as well as a number of private contractors, provide radon measurement services for homes. More information on radon and on the RPII measurement service is available at http://www.rpii.ie/.

Radon Testing/Certification

Workplaces have a reference level of 400 Becquerels per cubic metre and where they exceed this, employers must evaluate whether remedial action to reduce the radon concentration is justified.  The RPII has the authority to direct employers to carry out radon measurements.  Failure to comply with any such direction is an offence and can lead to prosecution.

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