COD volume in Japanese lake water 2006-2015

The statistic displays the overall average amount of chemical oxygen demand (COD) in lakes in Japan from fiscal year 2006 to 2015. In fiscal 2015, the COD volume in all designated lakes in Japan amounted to approximately 5.9 milligrams per liter, representing an increase from around 5.5 milligrams per liter in the previous fiscal year.

本统计数据展示了日本湖泊中化学需氧量（COD）的总体平均含量，时间跨度为2006财年至2015财年。在2015财年，日本所有指定湖泊的COD总量约为5.9毫克每升，较上一年度的5.5毫克每升有所上升。