My parents house was part of a national radon survey in Ireland back in the 90's I think. I had a small little black monitor/'counter' in my bedroom for maybe a

My parents house was part of a national radon survey in Ireland back in the 90's I think. I had a small little black monitor/'counter' in my bedroom for maybe a year (I'm a bit fuzzy on the details). Anyway, they sent us the results when the experiment ended and we sent the device back. The results were quite bad I seem to recall (I may be mis-remembering according to [0]) Our house was in rural Cork and was build by my parents in the 80's. My father died from lung cancer but he was a heavy smoker; my mother smokes very occasionally and she's fine. However, my aunt, who lived next door, maintained a very healthy lifestyle and also died of lung cancer; her husband is also fine. [0] https://www.epa.ie/radiation/radonmap/ https://www.epa.ie/radiation/radonmap/