YSK You should Use only cold water for drinking, cooking and making baby formula. Hot water from the tap has an increased chance of containing lead. Lead is harmful to health, especially for children.
from /r/YouShouldKnow
YSK 你應該只用冷水來飲用、烹飪和製作嬰兒配方奶粉。自來水中的熱水含鉛的機會增加。鉛對健康有害，特別是對兒童。