ABSTRACT
The Chaco-Pampean plain is the most populated region in Argentina and is threated by highly variable As contamination in groundwater. We conducted an assessment of As distribution based on a detailed geologic/geomorphic and groundwater surveys in the Pampean aquifer in the southern Pampean Plain. Groundwater As increased from older hills, young loess hills to floodplains (F unit) as a result of variable reactive substrates and position on flow paths. Integrated assessment of local As contamination is essential to reduce exposure by selection of appropriate mitigation strategies.
