Three-dimensional fluorescence analysis is considered to be applicable to various water quality management from water source to faucet water from being able to grasp the actual state of dissolved organic matter (DOM) in water quickly with high sensitivity. Among the Yodogawa River basin, it is clear that Katsura River has a large fluorescent load with a protein-like peak from sewage treatment plant discharge water, and the fluorescent substance decomposed and removed in the water purification process has chlorine trihalomethane formation potential (THMFP). It is found that there is a correlation with the decrease in. In addition, it is thought that the fluorescence intensity value of granular activated carbon (GAC) treated water can be used as one of the indicators of appropriate quality control of GAC, and the fluorescence intensity removal rate of the ozone contact pond is an indicator of ozonability evaluation. It was possible to utilize as. Furthermore, by utilizing three-dimensional fluorescence analysis, it was possible to quickly determine the presence or absence of an abnormality due to a water quality accident and the influence range.

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