The conductivity of well water in Taiwan has much high extents than that of Japan.Recently, many incidences of type I copper tubes pitting succeeded in Taiwan chemical plant.

• 然而由于台湾地下水的导电度比邻国日本为高，因此近来相当多的冷冻空调系统之铜管，发生了铜管孔蚀第一型冷水孔蚀。