MLA Citation: Bloomfield, Louis A. "Question 784"
How Everything Works 20 Apr 2018. 20 Apr 2018 <http://howeverythingworks.org/print1.php?QNum=784>.
784. Is it true that you can get lead poisoning in your home more easily from hot water than from cold water? — WH, Erial, NJ
Yes, assuming that your home has either lead pipes or copper pipes that were joined with lead-containing solders. That's because lead compounds are more soluble in hot water than they are in cold water. The amount of lead that was permitted in pipe solders has diminished over the years until now, when pipe solders can't contain any lead at all. While very little lead actually leaches out of the solder joints and enters the water, the effect is slightly more significant in hot water pipes than in cold water pipes. That's why it's recommended that you not use water from hot water pipes in cooking.

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