The goal of the study was to evaluate the water resources security of the Nanyang water district in the South to North Water Diversion Project. Researchers developed a system to assess water safety, determined weights for different factors using AHP, and used a fuzzy evaluation method to analyze the water security situation in 2013. The results showed that the Nanyang water district was in a very safe state. The study also identified potential factors that contribute to water security in the area.