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What does it mean Basil?
Lead is an odorless, tasteless, soft, gray metal. On exposure to air, lead is rapidly covered with a film of oxide, hydroxide, and carbonate. Similarly, when lead is exposed to water with dissolved oxygen, lead hydroxide, sulfate and carbonate are formed. A small amount of the salts then pass into solution. Lead salts are found in air, food, household dust and soil. If ingested or inhaled over a period of time, lead and its salts may cause serious internal damage such as impaired kidneys, nervoussystem and red blood cells. Particularly susceptible to the toxic metal or salts aresmall children.
Lead gets into the drinking water through the use of lead-containing pipes, solder, brass and chrome-plated faucets. The homes most likely to have a lead problem are older houses with lead pipes and homes with lead service lines.
The hotter the water the more soluble it is, thus hot tap water has the chance to cary more deposits.
When being heated, organic compounds in water, such as iron or manganese, can oxidize; this oxidation has the potential to cause discoloring or an off taste.
While this depends entirely on the tap water. I myself don't feel the need to save five minutes boiling water by using hot tap water, at the expense of even a slight change in taste. Or an off chance risk of health.
While something like boiling an egg probably won't matter. Some say it does in delicate foods like pastas.
my 2 cent
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