Why Are Radon Levels So High In The Twin Cities?
Thousands of years ago when the glaciers came through America, they deposited a great deal of radium and uranium that got ground deep into our soil. It is now at the right age that it is decaying and releasing radon gas. The midwest is the worst area in the nation for radon – 3 out of 4 houses in the midwest are above the EPA action threshold of 4 pCi/L.