at last count I think 4 or 5 of the 25 or 30 employees' had died of cancer.
That does seem quite shocking. Was it lung cancer or other types?
I believe the biggest risk factor for most cancers remains age.
I’ll repeat what I’ve said in this thread. Winnipeg is a hot bed for Radon. There is no corresponding huge increase in lung cancers that I’m aware of. From this I draw the conclusion that although Radon is a risk factor, it’s not a significant one. Just because your house has high Radon levels doesn’t guarantee you’ll get lung cancer, it just increases the risk when there are likely many many other factors that also come into play.
We had levels of Radon in our house where Health Canada suggested some form of mitigation. With a Radon Fan, levels are now around twice (or three times?) what ambient is, whereas before I installed a fan they were about 20 times higher.
(This is getting to be 10 to 15 years ago now, so my memory of exact numbers is getting dim).
Installing the sub-slab depressurization fan was an easy thing to do, and it had other benefits like decreased basement humidity. So I think it is a no-brainer to install a fan if needed, plus it required zero lifestyle changes. Not like some other risks such as driving a vehicle and breathing in exhaust.
Life has risks, mitigate the easy ones, minimize the ones you can. Don’t live too long since that decreases your risk of Cancer significantly…
(It’s not my intent to sound uncaringly flippant, I am trying to provide perspective. I panicked when we found high levels of Radon in our house. Risks are everywhere and can really stop you from enjoying life though)