Checking for Radon Gas can only be done with a proper Radon test. The United States Environmental Protection Agency (EPA) estimates that nearly one out of every 15 houses in the United States has elevated radon gas levels. Since it occurs naturally in soil, water, and rock when uranium breaks down, this gas can be found everywhere in the U.S. and can easily enter your home. You can use either a short-term or long-term testing kit, both of which are commercially available.
Purchase a radon test kit either through the mail or from your local hardware store. Such tests are relatively inexpensive, easy to use, and quick. Many states also offer free or low-cost tests. Contact your state radon office for more information about obtaining one. The EPA maintains a Website listing contact information for each state.
Make sure the testing device is at least twenty inches above the floor in a place where it will not be disturbed. You can hang it from a light fixture or the ceiling with string. Keep it away from exterior walls, drafty locations, and areas of high heat or high humidity.
Mail the sealed package to the lab indicated in the instructions for analysis. Send your test sample immediately to get the most accurate results before the radon begins to dissipate.