For nonsmokers, what is the risk of developing lung cancer at 4 pCi/L of radon?

The risk of developing lung cancer at a radon level of 4 pCi/L for nonsmokers is 7/1,000. This statistic is derived from studies that assess the risk associated with radon exposure and its correlation to lung cancer incidence. The number represents the estimated probability of an individual who is a nonsmoker developing lung cancer over their lifetime when exposed to the specified level of radon.

Understanding radon as a naturally occurring radioactive gas, it is important to recognize that even at lower concentrations, it poses a health risk, particularly when considering long-term exposure. The figures cited are based on epidemiological data and risk models which take into account factors such as exposure time and type of occupancy.

This specific risk assessment highlights that while individuals who smoke face significantly higher risks, even nonsmokers are not immune to the dangers of elevated radon levels. By providing this clear probability (7/1,000), public health messages can be effectively communicated regarding the importance of radon testing and mitigation.