We've cut off the water supply because they are doing repairs.

因为他们正在进行维修，所以停止给我们供水。

youdao

The town is without electricity and the water supply has been cut off.

这个镇上已经断电停水了。

《柯林斯英汉双解大词典》

The researchers then staged an “incident” in which the camp’s water supply was cut off and all the boys had to check the water pipe (more than 1 km long) to see where it was blocked.

研究人员接下来安排了一个“事故”，他们切断了营区的供水。 所有的男孩子都要去检查水管（长度不止1公里），看看是不是有哪里堵住了。

youdao

Many believe President Assad's men have deliberately cut the electricity and turned off the water supply in Aleppo.

BBC: Aleppo's winter of discontent

The quake, which was set off by the movement of a nearby fault, damaged the approaches to two bridges and concrete pipes that cut off water supply to the two villages.

WSJ: Quakes Kill 2 in Taiwan, Injure 33 in Philippines

Unicef says it plans on providing a month's supply of water treatment chemicals for the capital Harare where water supply has been cut off because the government of Robert Mugabe is unable to buy chemicals needed to clean tap water.

CNN: Cholera: 10 killer facts