Is the tap water safe to drink?

这自来水喝了不会闹病吧？

They worried about the purity of tap water.

他们担心自来水是否洁净。

You can ask for a chemical analysis of your tap water.

你可以要求给你的自来水做化学分析。

Your tap water is too hard.

你们家的水太硬。

Why can't I cook with hot tap water?

为什么不能用热的自来水做饭呢？