Understanding the migration and dispersion of potentially toxic elements (PTEs) from soil erosion is integral to managing mine site risks. Modeling PTEs distribution in this mass movement is a significant challenge. This research quantitatively analyzed the ecological-health risks associated with rainfall-induced soil erosion (debris flow) at the LaRonde Mine's tailing pile (Quebec, Canada). The present study adopted a comprehensive approach by employing rheological and infiltration models to correlate ecological-health indices with slurry distribution and calculated various indices to assess five PTEs (As, Cu, Ni, Pb, and Zn). Exposure values, hazardous quotients, and hazard index assessments were used to examine the potential risks to human health. The outcomes show that Zn presents the highest risk, followed by Cu, while As, Ni, and Pb pose no risk. Moreover, the toxic risk index and pollution load index exhibit lower accuracy than other indices. The computed results were visualized using Arc Geographic Information System (ArcGIS), providing a location-dependent risk level distribution and maps of contamination levels. This study demonstrates the importance of quantitative analysis in mine sites' ecologicalhealth risk assessment and provides a framework for developing soil conservation and management strategies at mine sites.