[MBAtarga]

From what I understand, some regions in North America have naturally occurring sources that create the radon gas - it has nothing to do with environmental waste, etc.

Our house has a system installed. Original owners didn't even have radon level tested but opted to have a system installed just in case. The exhaust blower motor runs continuously. The pipe intake is below the basement floor and also through the foundation wall that is adjacent to the three car garage above.