Arsenic is a naturally occurring element found in low concentrations in rocks, soils, water, plants, and animals (Nriagu, 1994 a, b). In Kentucky, arsenic is commonly found in iron sulfide minerals associated with coal deposits and black shales. Arsenic is released when iron sulfides oxidize during weathering. Once released, it is readily sorbed onto iron oxides and iron oxyhydroxides, which limits arsenic concentrations in the near-surface environment.
Information Circular 5
Digital Object Identifier (DOI)
Fisher, R. Stephen, "Groundwater Quality in Kentucky: Arsenic" (2002). Kentucky Geological Survey Information Circular. 1.