What should you do if your initial short-term test for a motivated homeowner returns a result of 4.4 pCi/L?

When a short-term radon test shows a result of 4.4 pCi/L, it is important to recognize that this level meets the action threshold set by the Environmental Protection Agency (EPA). The EPA recommends that homes with radon levels at or above 4.0 pCi/L should be subjected to further action, which typically includes mitigation.

Choosing to perform a long-term test after an initial short-term test result of 4.4 pCi/L allows for a more accurate assessment of the home’s radon levels over time. Long-term tests, which are conducted over a minimum of 90 days, provide a better understanding of the average radon concentration, as radon levels can fluctuate based on environmental factors, building occupancy, and seasonal variations. This extension of testing can give the homeowner more definitive guidance on whether mitigation is warranted.

While mitigation could be recommended based on the initial short-term test result, it’s prudent to confirm the radon levels over a longer duration before deciding on an action plan. Advocating for a long-term test provides the homeowner with the most reliable information to make informed decisions regarding their indoor air quality and radon exposure.