Myth #10 – Short-term tests aren’t enough to make a decision about taking action to fix radon in your home. This last of many myths is still a common one.
Fact: The fact is that short-term tests can be enough, provided you use more than one. Radon.com notes that two radon tests could be enough to take action provided that at least one of the tests is above the recommended 4.0 pCi/L. This would indicate that levels at least some of the time are above recommended level, and therefore that you might want to take action. Note that if you conduct two radon tests and neither is above 4.0 pCi/L that does not mean you are safe from radon. To conclusively know if you are safe from radon you must consistently monitor radon levels. That said, short term tests can lead to radon mitigation action if they conclusively show radon levels are too high.