There are patches of high density radon gas across counties Cavan and Monaghan.
And, it's the same in every county in Ireland, according to the Environmental Protection Agency (EPA).
In an effort to create more awareness of what is being described as the 'silent killer' the EPA subsequently launched a new interactive map.
It helps people to better understand the levels of radon gas where they live or work and the impact that will have on their health.
Speaking on this afternoon's Wider View, the EPA's Alison Dowdall advised everyone to log onto the organisation's website and explore the map.
She said the levels evident speak for themselves.
Ms Dowdall also added that radon has no colour or smell and is therefore very difficult to detect.
"Check the map; don't rely on what the situation might be at your neighbour's house - it could be different," she continued.
"Just go in and look.
"Even looking at the map now it's clear there is high risk in Carrickmacross, for example.
"It's the same in Castleblaney and in Ballybay; there is also high risk north of Monaghan.
"Cavan, in fact, is even patchier again.
"So, its important that everyone looks and the map and establishes their own risk."
