What is the international unit for measuring radon concentrations?

The international unit for measuring radon concentrations is the Becquerel per cubic meter (Bq/m^3). This unit is part of the International System of Units (SI) and is commonly used in scientific contexts to quantify the activity of radioactive materials, including radon gas.

One Becquerel represents one disintegration or decay event per second, providing a clear and standardized way to express radioactivity levels. The focus on Bq/m^3 emphasizes not only the concentration of radon in air but also aligns with international standards for radiation measurement, making it essential for regulatory purposes and health assessments.

While other units, such as picocurie per liter (pCi/L), are also used—especially in the United States—Becquerel per cubic meter is the standard internationally recognized by organizations such as the International Atomic Energy Agency (IAEA) and the World Health Organization (WHO). This emphasis on Bq/m^3 in an international context ensures consistency in how radon exposure and its associated health risks are communicated and addressed globally.