Can you make a cup of tea with hot tap water?
Keeping this in view, can you use hot tap water for tea?
So let's say you get a bit lazy and you don't FULLY boil the water you're about to use in your tea. Legionellosis can survive hot-but-not-boiling water. Water heaters are a breeding ground for Legionellosis. So in general, it's safer to use the cold tap, bring it to a full boil, and drink that.
Secondly, can you drink from the hot water tap?
The Claim: Never Drink Hot Water From the Tap But environmental scientists say it is real. The reason is that hot water dissolves contaminants more quickly than cold water, and many pipes in homes contain lead that can leach into water. And lead can damage the brain and nervous system, especially in young children.
Getting a kettle of hot water to a boil takes roughly half the time as boiling a kettle full of cold water (despite the myth that cold water actually boils faster). On the safety front, many argued hot water heaters, over time, build up impurities and sludge that can get into the hot water that comes out of your tap.