Here’s the hard truth: one minute of a rolling boil is enough to kill most bacteria, viruses, and protozoa. Yes, you read that right—just sixty seconds.
At sea level, water boils at 212°F (100°C). At that temperature, the cellular walls of bacteria literally explode. It’s not a gentle process—it’s a microbial apocalypse.
But wait—what about those streams at high altitude? Good catch. That is where the story gets tricky.
High Altitude: The Rule Breaker
Water boils at lower temperatures as you climb. At 10,000 feet, it’s bubbling away at a measly 194°F. That’s hot enough for tea, but not hot enough to kill everything quickly.
If you’re above 6,500 feet (2,000 meters), bump that boil time to three full minutes. It’s not rocket science, but it’s the difference between a clean drink and a date with diarrhea.
So, Dave was partly right—longer boils matter, but only when your stove is gasping for air.
