Radon Gas and Real Estate

Picocuries = pCi

It’s how radioactive decay is measured.

1 pCi equals 2.22 decays per minute per liter of air


A curie is named for Marie Curie, an extraordinary woman who discovered radium. A ground breaking scientist in a man’s world of science, she was awarded the Nobel Prize in physics in 1903 and in 1911 awarded another Nobel Prize in chemistry. She was the first woman to receive a Nobel Prize and is the only person to have been awarded two Nobel Prizes in two different fields of study – ever!

Radon is a natural occurring gas in soil; it is a radioactive gas that has been found in homes all over the United States and the world. It comes from the natural breakdown of uranium in soil, rock, and water and gets into the air you breathe in your home. Radon typically comes up through the ground and into your home through cracks and other tiny holes in the foundation. It is a cancer-causing agent. A silent killer with no odor or taste. Most people don’t know about it and how harmful it is.

Who measures anything in picocuries?

Radon gas is measured in picocuries per liter of air. In the United States 4 or less picocuries in a home is considered safe. Some states says 2 or less is safe. The World Health Organization says 2.7 or less is safe.

(Although no level of radon is really safe.)

I strongly recommend that radon levels in homes be tested, especially when buying a home. If the radon level is above  4 pCi/liter I suggest radon mitigation to bring the level below 4. A radon mitigation professional should be consulted to determine how to best reduce the radon in a home.


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