Contamination of surface and subterranean water in an deactivate open pit dump. Arroio Dourado - Foz do Iguacu - PR

In Foz do Iguacu (Parana), 63 families live on the area of deactivate open pit dump: Arroio Dourado. The consumed water comes from artesian wells and "cacimba " wells and there is no sewage system. The area is bordered by Arroio Dourado river, which is an affluent of one the springs that supplies the city. In this study, the Arroio Dourado`s water and subterranean water consumed by families was assessed. Inorganic compounds were evalueted in situ, ions and cations, pesticides and organic compounds were studied. The following were detected: 2-2 butoxyetoxy acetate ,Caffeine Diethyltoluamine, 2,4trimethyl-1,3-pentanediol diisobutyrate, 3-methylbutyl octanoate, Tributyl acetylcitrate e 3 methylbutyl ester. Pesticides were not founded. The downstream points of open pit dump and the cacimba wells are those with the greatest contamination. Several compounds found are not described in Brazilian legislation with demonstrates their fragility. The water was collected in the dry season. Collections are also recommended at other times.