Levels of arsenic in the drinking water in Leales and Graneros (Tucuman-Argentina)

The aim of this work was to investigate the contamination with Arsenic (As) in drinking water in Leales (L) and Graneros (G) (Tucuman), the relationship between the level of pollution and the depth of the wells, and the presence of cutaneous signs. The determination of As was made by the quantitative method of modified Gutzei. A hundred and twenty-two individuals were selected. A total of 9.3% and 34.7% of 140 samples of L and 95 of G respectively have allowed levels. The average concentrations in L were 0.112; 0.087 and 0.096 mg/L for depths lower than 10; 11 to 25 meters, and higher than 25 meters respectively. No difference was found between the different depths. The average concentrations in G were 0.163; 0.045; 0.405; 0.056 mg/L for the wells lower than 10; 11 to 25: meters with concentrations moderately and markedly raised, and higher than 25 meters respectively. Differences were found between the concentrations of As and the depth of the wells. A total of 12.4% of 89 of L and 39.4% of 33 individuals examined of G showed cutaneous signs. This pathology is of high importance in depressed areas of the Argentina, is linked to an inadequate provision of water.