Sales contracts routinely provide radon test results for buyers, he said.

In most cases, though, radon tests are conducted for a more practical reason.

We had the radon test, but that's inside, not your backyard.

All radon tests should be taken for a minimum of 48 hours.

Take steps to prevent device interference when conducting a radon test.

Two tests taken at the same time (simultaneous) would improve the precision of this radon test.

Most companies that perform radon tests offer several different kinds.

Well tests cost $50 to $200 and a radon test runs $75 to $125.

Though the first radon test indicated the house was safe, a re-examination showed a level three times higher.

"And we certainly have not seen a radon test become mandatory for a closing on a home in this state."