Speaker
Description
This study evaluated organ-specific annual effective doses and excess lifetime cancer risk (ELCR) from radon exposure through 20 groundwater samples in a selected population. The experiment was analysised using Liquid Scintillation Counter (LSC). Radon concentrations ranged from 10.6 to 43.1 Bq/L, with over 90% of samples exceeding the U.S. EPA limit of 11.1 Bq/L, though remaining below the WHO limit of 100 Bq/L. Total annual effective doses ranged from 34.4 to 140.1 µSv/year, with the lungs receiving the highest organ-specific dose (up to 13.0 µSv/year), followed by the stomach. Estimated ELCR values (1.21 × 10⁻⁴ to 4.90 × 10⁻⁴) exceeded the EPA's acceptable threshold of 1.00 × 10⁻⁴ in most samples, suggesting a notable radiological health risk. Inhalation was the dominant exposure pathway. These findings underscore the need for regular monitoring, public awareness, and mitigation measures in areas with elevated groundwater radon levels.
