At a level of 4 pCi/L, what is the risk of lung cancer for non-smokers?

At a concentration of 4 picocuries per liter (pCi/L) of radon, the risk of lung cancer for non-smokers is estimated to be approximately 7 cases per 1,000 never-smokers. This risk is based on epidemiological studies that have established a dose-response relationship between radon exposure and lung cancer incidence.

The risk level reflects the understanding that radon is a significant indoor air pollutant and a known carcinogen. When radon gas accumulates in homes, particularly in poorly ventilated areas, it can lead to prolonged exposure, which increases the risk of developing lung cancer. The specific figure of 7/1,000 for non-smokers underscores that while non-smokers have a lower baseline risk compared to smokers, they are still at risk from radon exposure.

Understanding these statistics is crucial for mitigating strategies, as they help to inform homeowners about the importance of radon testing and potential mitigation measures to lower indoor radon levels, thereby reducing cancer risk.