In partnership with the Inuit community of Inukjuak (Nunavik, Québec, Canada), our research examines how environmental change and hydroelectric development in permafrost regions can influence mercury (Hg) mobilization and methylmercury (MeHg) production in soils, waters, and aquatic food webs. We also explore the nutritional value and potential contaminant transfer in traditional country food preparations to support food security and informed decision-making.