Radon discovery examinations are designed to identify radon gas in picocuries per liter of air (pCi/L). The picocurie is made use of to measure the magnitude of radiation in terms of fragmentations per minute. One pCi, one trillionth of a Curie, translates to 2.2 fragmentations per minute. The most typical geologic source of radon stems from the degeneration of uranium. Radon is commonly found at reduced levels in extensively spread crustal formations, dirt, and also water samples.