Importance of checking radon levels in your home Testing your home for radon By Caroline Klapp | January 5, 2021 at 10:41 PM CST - Updated January 6 at 10:59 AM HUNTSVILLE, Ala. (WAFF) - A question for you to consider, when was the last time you checked the radon levels for your home? It turns out north Alabama is one of the highest risk spots in the state for dangerous amounts. Radon comes from the ground and can settle underneath the slab or crawl space of a building. If the levels are too high, it can lead to dangerous issues such as lung cancer. The Alabama Department of Public Health is urging people to test their homes for radon this winter.