Here in SW Pennsylvania, a radon test is mandatory for a title transfer and, if the home doesn't pass, the problem has to be corrected and retested until it does pass to get a title transfer.
I really do not know enough to say whether radon is the claimed threat or not, but I do know that you shouldn't buy a house without a clear title transfer.
I got around the problem in North Dakota when I gave the buyer's a quit-claim deed. The law there was that he county had to accept a quit-claim deed as a title transfer after the buyers occupied it for three consecutive years. Thus, we were able to avoid the mandatory radon test quite legally.
That sucks. Radon is nothing but a total and complete scam so sellers of those fans and testing can get more money on every home sale.
I bet if we introduced a passage into an environmental bill that said no device may be installed that removes air from the home to help prevent CO in the atmosphere from the additional utilities the environmental wackos would go for it and this radon scam would go away once and for all.
Radon is another example of the sick joke our government has become. The EPA backed the Radon scam as no doubt people within the EPA were paid off or emotionally believed in it as liberals, but now the EPA has backed off mandatory testing. They can’t seem to simply disclaim it as they are afraid they have already put their mouth in it.
The EPA is a useless taxpayer welfare state.