What if my first radon test is lower than the EPAs action level of 4pCi/L?
The EPA recommends that more than one passive test be run to accurately determine radon concentration. Following those guidelines and determining that radon concentration is modest, a homeowner may choose to retest the home during the opposite season, or perform a long term test to be certain. It is beneficial to test for radon periodically throughout the years, even if initial tests are low as the soil composition and structure under your home may change form, especially if major ground moving events are reported, i.e. blasting, earthquakes, global earth shifts. The EPA recommends that homes with mitigation systems be retested at least every two years.
