Offered in both temporary and also long-term tracking, the tests are easy to utilize and also require marginal setup. " The examination is trustworthy and low-cost-- it does not take brain surgery," states Costs Wehrum, an administrator at the EPA's Workplace of Air and also Radiation. The EPA recommends doing a second radon test if an initial short-term test registers 4 picoCuries per liter (pCi/L) or higher. If a 2nd test registers over 4 pCi/L, take into consideration taking steps to reduce radon levels in your home, the EPA cautions.