professional radon testing 5
https://eparadonactionlevelhouse.valoradigest.com/posts/understanding-the-epa-radon-action-level-for-st.-louis-homes
When my realtor suggested a professional radon test before closing, I figured it was just another box to check. The technician set up a small monitor in my basement for two days, then sent the device to a lab. Got the results back showing safe levels. Worth the peace of mind, especially with kids playing down there.