Structures built above karst cavities are prone to infiltration of radon due to fluctuations in atmospheric pressure (Ruthven, C. et. el., 2002). Also, it is believed that considerable amounts of radon are produced with in the soils overlying karst bedrock. This radon is thought to be released into water reservoirs beneath the surface following heavy rain events (Savoy, L. et el,)
Radon gas in groundwater seeping through your leaking basement wall and floor because of hydrostatic pressure causing a wet basement can be harmful to your health.
Household radon test kits are readily available and fairly inexpensive. They are easy to use and the results are easy to evalute. Levels registering greater than 4.0 picocuries are cause for concearn. If you find yourself in this category, the EPA recommends actions be taken to improve the conditions within your residence such as allowing for more ventilation of basements and crawlspaces in the house, as well as sealing crawl spaces with plastic. Also, these potential geologic hazards can be identified by geologists in order to mitigate the risks that are presented by the karst bedrock.
Radon infiltration is a problem to be taken seriously. Prolonged exposure to the gas can result in serious health problems and even death. If you believe you may have radon infiltration problems, here is a link that may help you:
Free radon testing kits through the EPA: - Click Here