9 páginas, 5 figuras, 5 tablas, 2 mapas.-- Trabajo presentado en el VI ALHSUD- XXXII AIH Congreso Mar del Plata 2002.This work study water quality of the Pergamino River watershed in the Undulated Pampa in the northeast of the Argentinean Province of Buenos Aires. Temperature, pH, specific conductivity, Na, K, Mg, Ca, SO42Cl; HCO3, NO3, Si, Ag, Al, As, B, Ba, br, Cd, Co, Cr, Cu, Fe, Hg, Li, Mn, Mo, Ni, P, Pb, Se, Tl, U, V, Zn, and the (omega 18) O and (omega2)H isotope ratios were monitored in eighteen sampling stations. Groundwater and surface water are of sodium bicarbonate type, evolving to sodium sulfate-chloride type in the case of surface water.This work has been partially funded through the Proyect T657 from University of Buenos Aires.Peer reviewe
