What is the only way to know if there is a radon problem in a house?

Testing is the only definitive method to determine whether there is a radon problem in a house. Radon is a colorless, odorless gas that originates from the natural breakdown of uranium in the soil, and it can enter homes through cracks in floors, walls, and other openings. Visual inspection alone cannot identify the presence of radon, as there are no detectable indicators visible to the naked eye. While installing ventilation systems can help mitigate radon levels if they are found to be elevated, it does not provide a means to assess the presence of radon initially. Consulting a contractor can be informative but does not replace the need for specific radon testing to measure actual levels of the gas in the living environment. Therefore, conducting a radon test is essential to accurately assess any radon issues.