Since there aren’t any telltale signs of radon gas, every homeowner should honestly have their home tested just to be sure. A short term radon test (3-4 days) can be done to give a homeowner an idea of their current radon levels. Long term (up to 90 days) follow up tests can also be conducted after the results of the initial short term test.
What do your results mean?
The Environmental Protection Agency has set a threshold of 4 PicoCuries/Liter (pCi/L) or higher as the point where you should take corrective action in your home. A PicoCurie is simply a measure of radioactivity. Let’s say that your results are right around 4 pCi/L and you’d like to get more accurate results to see if your home needs a mitigation system, the best course of action would be a long-term test to give you more precise results from a larger sample size.The EPA does note, however, that if your short term tests are at least double the 4 pCi/L threshold, immediate action is recommended.