Which counties in California are noted for having the highest risk of radon?

Ventura and Santa Barbara counties are recognized as having higher risks of radon due to geological factors that contribute to radon gas accumulation. Radon is a naturally occurring radioactive gas that is produced from the decay of uranium in soil and rock. Areas with geological formations that contain uranium, such as certain sedimentary and crystalline rock types prevalent in coastal provinces, are more likely to have elevated radon levels.

Ventura and Santa Barbara counties, located along California's central coast, contain geological conditions that facilitate the movement of radon gas from the ground into homes and buildings. Factors such as soil permeability, local geology, and the construction practices in these counties also influence radon levels.

To mitigate health effects, especially lung cancer risks associated with long-term radon exposure, it's essential to recognize these areas and recommend radon testing for residents. Identifying areas at risk is crucial for public health initiatives and for safeguarding residents from potential health hazards associated with elevated radon concentrations.