What is radon?
Radon is a colorless, odorless radioactive gas that is produced by decaying uranium in the earth's soil. It’s present in nearly all soils, and very low levels of radon are found in the air we breathe every day. Higher levels of radon can be found indoors. Closed home conditions tend to keep levels of radon gas from being diluted by fresh air. This is one reason exposure is higher in winter months.
How does radon enter a home?
Radon gas is drawn into a home from the surrounding soil through any cracks, gaps, and penetrations in a home's foundation wall or floor. It also can seep directly through pores in concrete. Any home, of any age, in any state, can have elevated radon levels. It ultimately depends on the design and way your home interacts with the surrounding soil. Radon levels are usually highest in the basement or crawl space as this level is closest to the source of the radon. Therefore, people who spend much of their time in basement rooms have a greater risk of being exposed.