The temperature at which water boils isn’t the same everywhere. Water can become superheated (ie, over 100C/212F without boiling) due to lack of nucleation points. Other. This will also mean a lower air pressure and therefore a lower boiling point (but this will be very insignificant). Hot water in a cup is the same, no matter how it got hot. I just read this little story. Distilled water is what you get if you gather that water vapor on some cool surface. Before the days of advanced sanitation, and at- home-water filters, boiling was one of the primary methods used to make water safe. BUT, be extra careful with microwave because the water might pass the boiling temperature and does not show any bubbles (no bubble formation) and it starts boiling when you move it or shake it or put external object (Tea for example) inside, which might be dangerous. Boiling point depends on pressure. As long as you nuke it until it's boiling, you get the same results. Water Heated a Microwave Can Violently Erupt and Cause Injury-Truth!Summary of eRumor: The writer of the email says his or her 26 year old son was scalded by water that erupted from a container after being heated in a microwave. In it she took filtered water and divided it into two parts. There's no nutrition in water - or there shouldn't be - it should be H2O. This microwave trick can almost cut the time it takes to bring water to a boil in half. When the timer shut the oven off, he removed the cup from the oven. If the bowl is real smooth, it can't boil, becuase the bubbles have to have some kind of imperfection to form. Boiling vs Microwaving Water to Sanitize? I am not sure how long he set the timer for, but he wanted to bring the water to a boil. I am not sure how long he set the timer for, but he wanted to bring the water to a boil. However, the discerning tea drinkers would be correct in saying that a microwave heats water differently than a stove does. A good cup of tea is a wonderful thing, but if you don't have a hot water tap or a kettle nearby, you may be tempted to toss your mug in the microwave to get some hot water. It's about what you're made of, not the circumstances.” I live in an area where there is a lot of limescale, and dissolved salts and impurities will lower the boiling point of water to below 100 degrees C. While fairly close, I do not live at sea level. Should I Boil Water on the Stove or in the Microwave?