When water hits 212°F (100°C) at sea level, you’re essentially throwing a bacterial rave and then setting the building on fire. Most common pathogens—like E. coli, Salmonella, and Giardia—can’t survive that kind of heat for more than a minute. Their cell walls literally cook, their proteins denature, and that’s it: curtains.
The magic number is rolling boil, not just a few bubbles. A gentle simmer might get you to 180°F, which can stun bacteria but won’t reliably kill them. The World Health Organization recommends a vigorous, one-minute boil for clear water, and three minutes if you’re at high altitude (where water boils at a lower temperature).
Think of it as a very efficient, very old-school disinfectant. No fancy filters, no UV lights—just heat and time. That’s a technology humans have trusted for thousands of years, from the Han Dynasty making tea to modern backpackers boiling stream water in titanium pots.
