A structured approach is required for the groundwater vulnerability assessment to obtain justifiable and transparent decisions with explicit trade-offs between complex and vague hydrological factors. The qualitative analysis was conducted through the MCDM basedonexpert opinions anddecisions. Expert experience obtained through particular applications was used to weigh the influential factors in a definite range. The PCM was completed through 13 expert judgments. AHP is one of the popular methods that use MCDM techniques; thus, the present study adopted AHP to formulate the decisions and processes based on human opinion (Lee et al., 2001).