The Environment Protection Agency claims that in order for a home to be deemed safe, the radon levels should not exceed 4 pCi/L. If your test results come back slightly elevated you may want to consider a follow-up test in order to confirm whether radon levels are high enough to warrant mitigation. If the average of the initial test and the second test results are equal to or greater than 4 pCi/L, then radon mitigation is highly recommended. If the average of the two test results are less than 4 pCi/L, consider testing again sometime in the future. Additionally, because radon levels can fluctuate between seasons or during varying weather conditions by a considerable amount, a retest following the initial test may be wise.
