Factors affecting the decision-making of appropriate sites for WWTPs

The aim of this research was to examine the factors associated in decision-making processes for the selection and evaluation of optimal sites for wastewater treatment plants (WWTPs). The data for this study was collected by an established questionnaire, which received responses from a total of 62 engineers with various specialties These engineers are employed in both the public and private sectors. The reliability and validity of the questionnaire were investigated with the use of Cronbach's Alpha, which showed that the results were consistent with acceptable standards. The Relative Importance Index (RII) technique was employed to evaluate the responses for the 31 factors. The study's findings indicate that the distance from population settlements had the highest level of importance according to the RII scale. This was followed by the distance from wells or groundwater, and then the distance from historical and religious areas. The temperature factor had the lowest RII score in this research.