The EPA recommends testing for radon before buying or selling a home. You may want to test every couple of years as well, since radon levels fluctuate. While we’re conducting your home inspections we’ll set up a radon detector in the building. This detector will take hourly readings of the air for the next 48 hours. We’ll then use the information collected during these readings to calculate the average radon levels. Any building with an average of 4 pCi/L or over is dangerous. The good news is that there are several forms of very effective remediation.