The Environmental Protection Agency (EPA) is calling on all householders to test their homes for the cancer-causing radioactive gas – radon.

Radon is the second biggest cause of lung cancer after smoking. In Ireland, it is estimated that about 300 lung cancer cases each year are linked to radon exposure.

Radon gas can seep into a home through small cracks and gaps in the foundations of the building or openings around service pipes.

It comes from the rocks and soil in the ground under the home and some of the worst affected parts of the country are rural areas in Galway, Mayo and the south-east.

Radon testing

Radon has no colour, taste or smell, so the only way to know how much of the pollutant is in a home is to carry out a radon test.

The test costs about €50 and is done by post using one of the services registered with the EPA.

The test kit includes two radon detectors – one should be placed in the bedroom and one in the living room.

After three months, the detectors are posted back to the provider and analysed to see how much radon they have been exposed to in the home.

The results are posted back to the home owner or occupier, with advice on how to deal with any high radon readings.

Manager of the EPA’s radon programme Stephanie Long said:

“Exposure to high levels of radon can cause lung cancer and many families are unknowingly living with this indoor air pollutant.

Earlier this year, one home was found to have over 22 times the acceptable level. Living with this level of radon gives a radiation dose equivalent to getting 15 chest x-rays a day.

How to reduce radon?

The EPA says reducing radon levels is simple and inexpensive and will immediately reduce the risk of developing lung cancer.

For moderate levels of radon, improving indoor ventilation may reduce the level by up to half, the cost of which is low.

For higher levels, a fan assisted ‘sump’ can be installed which can reduce radon levels by over 90%. The sump can be installed in a day by a contractor with little disruption to the home.

Alison Dowdall of the EPA said: “Radon is everywhere but is only a problem if it is ignored.

Testing for radon – where high levels are found – and fixing the problem are both relatively straightforward and easy to do.

“Now more than ever, as people spend more time at home, we would urge everyone to take action on radon, improve your indoor air quality and keep your home safe from this cancer-causing gas,” she concluded.