Ionizing radiation from naturally occurring radioactive materials (NORM) can pose significant health risks to humans, particularly when contaminating groundwater. As a vital resource, groundwater is essential for drinking, irrigation, and industrial processes in many regions worldwide. Therefore, this study developed a comprehensive and innovative method for groundwater source-specific radiological risk assessment, integrating multivariate statistical analysis, the two-dimensional Monte Carlo simulation (2D MCS), and a geographic information system (GIS) for mapping. Groundwater samples from an agricultural region were analyzed for radionuclides, including