Even higher levels of As in surface and groundwater were recently reported for Chasicó Lake, reaching up to 166 and 413 μg L− 1, respectively (Puntoriero et al., 2014a and Puntoriero et al., 2014b). High concentrations of As in water and sediments were also reported for streams and rivers near Chasicó Lake, ranging from 181 to 1134 and 246 to 1031, respectively (Rosso et al., 2011 and Rosso et al., 2013).