At high elevation above 6,500 feet, how long should water boil?

Three minutes.

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  1. One hour
  2. Three minutes ✔
  3. Ten seconds

Why: Boiling a full minute kills most organisms, but at high elevation boil three minutes.

Huh, didn't know that: Boiling a full minute kills most organisms, but at high elevation boil three minutes.

The dad joke
High and dry? Boil a bit longer!
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References

Answer: Three minutes. Boiling a full minute kills most organisms, but at high elevation boil three minutes.

  1. Scouting America: Backpacking www.scouting.org/merit-badges/backpacking
    At elevations of 6,500 feet and above, boil for three minutes.
    Checked 2026-11-07.

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