喝水的那些事：你做得对吗？

Why can’t I cook with hot tap water? Why must it be cold, even if I’m going to heat it anyway?
为什么不能用热的自来水做饭呢？即使我是要进行加热，为什么一定要用冷的自来水呢?

Hot water can dissolve tiny amounts of lead from your plumbing system. Older homes may have lead pipes, but even new plumbing that’s lead free can still contain lead in brass fitting or faucets or in copper pipes with soldered joints. In one study, tap water accounted for up to 20 percent of human exposure to lead. Boiling can further concentrate lead, which can damage your brain and nervous system. If you’re using a faucet that hasn’t been in use for the past 6 hour or some, first flush the piped by letting the cold water run until it’s as cold as it will get.
热水会分解管道系统中的微量铅。旧的家庭用的是铅管，但是即使是新的无铅水管装置在焊接接头的铜管件或水龙头或铜管中也含有铅。一项研究表明，自来水占人体所接触到的铅的20%。煮沸的水会进一步使铅聚集起来，对你的大脑和神经系统有害。如果你使用一个没有用过或大约6小时没用的水龙头，首先要开着水龙头让水流出来，冲洗水管，直到水变得跟正常一样冷。