long-term radon test 3

https://theradonlevelsstlouisdeck.nexorafield.com/posts/understanding-radon-levels-st-louis-what-homeowners-need-to-know

A long-term radon test is the most reliable way to check your home for this radioactive gas, which can cause lung cancer over time. Unlike short-term tests, which only give a quick snapshot, this test lasts for at least three months, capturing seasonal changes and daily fluctuations. You just place a small detector in your lowest living area, leave it undisturbed, then mail it to a lab for results. It's simple, accurate, and gives you real peace of mind about your indoor air quality.