Abstract
日本の上下水道事業は，高度成長期とそれ以降の比較的短い期間で普及率が大幅に上昇し，上水道事業の普及率は2019年現在98.1％，下水道事業の普及率は2020年現在80.1％である。このように高い普及率のみならず，水道水質基準や下水道放流水質基準を設定し，それらの基準値を
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