Contamination of Groundwater usgs.gov
Mar 02, 2019·Enters environment from natural processes, industrial activities, pesticides, and industrial waste, smelting of copper, lead, and zinc ore. Causes acute and chronic toxicity, liver and kidney damage; decreases blood hemoglobin. A carcinogen. Barium Occurs naturally in some limestones, sandstones, and soils in the eastern United States.