Radon escapes from the ground into the atmosphere by diffusion. Continuous electronic radon monitors generally produce the most accurate radon measurements. However, they are expensive and can be difficult to operate. This means that if you want to assess your long-term exposure to radon, you need to measure over a period of a year or more. ATDs can readily supply that information at a reasonable cost.
Radon fluctuates daily and seasonally.
For this reason, radon measurements should be taken for at least a month for a short-term test. L. A year-long test in a living space where you spend a lot of time would be the most efficient and effective way for the first assessment of the radon hazard in your home. A Becquerel is one radioactive disintegration per second. See the Glossary for definitions for units of radon progeny and radiation dose. Sometimes radon concentrations can be reduced to acceptable levels by increased ventilation.