What is a key characteristic of well water in the context of radon transport?

Well water can be a source of radon because radon is a naturally occurring radioactive gas that can dissolve in groundwater. When water from a well is drawn up, it can carry radon gas with it, particularly if the water is sourced from areas where the geological composition contains uranium or radium. These elements decay and produce radon gas, which can then enter the water supply.

Understanding this characteristic is critical for radon measurement and mitigation professionals, as it highlights the need to test water from wells in radon-prone areas. Testing well water for radon is an important step in ensuring safety for those who consume it, particularly since radon exposure is linked to health risks, including lung cancer.

The other options do not accurately reflect the context of radon in well water, emphasizing that well water can indeed be a source of radon, making option B the correct choice.