Groundwater natural arsenic contamination

Kirk, M.F., T.R. Holm, J. Park, Q. Jin, R. A. Sanford, B.W. Fouke and C. M. Bethke, 2004, Bacterial sulfate reduction limits natural arsenic contamination of groundwater. Geology 32,953-956. 

Pelczar, J. S., 1996, Groundwater chemistry of wells exhibiting natural arsenic contamination in east-central Wisconsin M.S. Thesis University of Wisconsin-Green Bay, 206 p. 

Eshete, D.W. and Chyi, L.L. (2003) Source identification and natural attenuation of arsenic contaminated groundwater in northeastern Ohio. Abstracts with Programs. The Geological Society of America, 35(6), 565. 

Contaminants polluting our water may be chemical or microbiological. Chemical hazards are caused by the chemical compounds which may be inorganic or organic. They may be present in the water due to the natural source, such as arsenic, which is a natural component of some soils and may be dissolved in groundwater. Alternatively, the contaminant may have been introduced into the ecosystem or the water source by human activity, such as pesticides, that trickle down sediment layers and streams and find their way into our freshwater. Some contaminants are by-products of chemicals used during the disinfection processes applied. 

---