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The EPA recommends that an initial short-term test be performed in a closed building. An initial short-term test of 2 to 90 days allows residents to be informed quickly in case a home contains high levels of radon. Long-term tests provide a better estimate of the average annual radon level. [108]
Since indoor radon levels are tied to airflow, levels can fluctuate day to day and by season. This makes long-term testing, which takes between 90 and 365 days, the most accurate method.
More than 26% of Erie County homes tested for radon between 2010 and 2020 have detected high levels of the odorless, colorless, tasteless, and deadly gas. High levels of deadly radon gas found in ...
Because high levels of radon have been found in every state of the United States, [18] testing for radon and installing radon mitigation systems has become a specialized industry since the 1980s. Many states have implemented programs that affect home buying and awareness in the real estate community; however, radon testing and mitigation ...
In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine. The level in a mine can go up when a mine is abandoned; it can reach a level which can cause the skin to become red (a mild radiation burn). The radon levels in some of the mines can reach 400 to 700 kBq m −3. [17]
Radon test kits can be purchased by calling the Illinois Radon Hotline at 800-325-1245 or at most hardware and department stores. It is recommended to conduct one short-term test and one long-term ...