It also changes throughout the year. I have a smart radon detector and radon mitigation system. It will randomly spike, despite the mitigation system it actually becomes detectable in my basement. It goes from basically 0 (0.1-0.3 pCi/L) most of the year to Low (1-1.5 pCi/L). Nowhere near the bad levels, but I get notified whenever it spikes.
My house has a radon mitigation system. I grew up 6 blocks away and lived in the basement for awhile, no radon mitigation system there =\
That is completely normal. One house can test for high levels and the house right beside it will have none. It is the strangest thing.
To be fair the house I grew up in had never been tested that’s more my concern lol
It also changes throughout the year. I have a smart radon detector and radon mitigation system. It will randomly spike, despite the mitigation system it actually becomes detectable in my basement. It goes from basically 0 (0.1-0.3 pCi/L) most of the year to Low (1-1.5 pCi/L). Nowhere near the bad levels, but I get notified whenever it spikes.
I don’t think awareness, testing, or mitigation of radon was common until about 2000.