This paper proposes a fuzzy-based method for evaluating soil corrosivity to predict water main deterioration based on soil resistivity, pH, redox potential, sulfide content and soil type. The fuzzy-based method considers three levels of soil corrosivity, non-corrosive, moderately corrosive and corrosive - in contrast to the commonly used 10-point scoring method, which has only two classes, corrosive and non-corrosive. Two case studies are used to validate the application of the proposed fuzzy-based method to predict soil corrosivity and the results are compared to the 10-point method.
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