The problem of undesirable facilities location has been extensively studied in literature in terms of both social and technical aspects. The current state-of-art is based on the combination of spatial techniques, such as geographical information systems (GIS) and multi-criteria decision analysis (MCDA) (Sumathi et al., 2008 and Tavares et al., 2011). The purpose of GIS was to perform an initial screening process to eliminate unsuitable areas, mainly working at the macro-siting level, followed by the utilization of MCDA to select the most suitable sites. Table 1 shows examples of studies presenting the different methodologies developed until now.