What is the acceptable level of radon?
The US EPA has established the action level for deciding when you need to do something about the radon in your home, school, or work place at 4 pCi/liter. One pCi/liter means that in one liter of air there will be 2.2 radioactive disintegrations (events) each minute. For example, at 4 pCi/l there will be approximately 12,672 radioactive disintegrations in one liter of air, during a 24-hour period. You can read or download a copy of the US EPAs A citizens guide to radon. This publication goes into greater detail describing the meaning of your radon test results and what your personal hazard from the exposure may be.
The US EPA has established the “action level” for deciding when you need to “do something” about the radon in your home, school, or work place is 4 pCi/l. Read more about the difference between “safe” and “acceptable” radon levels. pCi/l= pico curies per liter, the most popular method of reporting radon levels. For those interested in the numbers, a pico curie is 0.000,000,000,001 (one-trillionth) of a Curie, an international measurement unit of radioactivity. One pCi/l means that in one liter of air there will be 2.2 radioactive disintegrations each minute. For example, at 4 pCi/l there will be approximately 12,672 radioactive disintegrations in one liter of air, during a 24-hour period. 4 pCi/l is the level accepted by most states and US territories, except for New Jersey. New Jersey’s Department of Environmental Protections has established 2 pCi/l as the acceptable action level in their state. In other countries, the action level ranges from 150 Bq m3, which is slightly less than 4
