MEBRO

FACT CHECK #_JQRWVFE

10/11/26 · 9:25 PM UTC · 12 SOURCES

“Water boils at 100°C at sea level.”
TRUE ✓

HIGH CONFIDENCE

TL;DR ·Water boils at 100°C at standard sea-level pressure, with only a minor rounding nuance.

WHAT WE FOUND

The claim is accurate. A university chemistry resource states that at sea level water will remain at 100 degrees Celsius (1 atm or 101.3 kPa) while boiling . The USDA Food Safety and Inspection Service confirms that water boils at 212 °F (100 °C) at sea level and at lower temperatures as elevation rises . Britannica , EBSCO , and Compound Interest agree. Compound Interest explains that boiling occurs when vapour pressure equals atmospheric pressure, which happens at 100 °C at sea level . One minor nuance: Wikipedia notes that 100 °C is rounded from the more precise 99.97 °C under standard pressure . This is a rounding detail and does not change the claim. Actual boiling temperature also varies slightly with weather-related pressure changes and with dissolved substances, but the standard statement holds. Altitude effects, such as about 202 °F in Denver , apply to higher elevations, not sea level. Sources 2, 3, 8, 9, and 10 do not add evidence on this point.

SOURCES

  1. 1 · fsis.usda.govACADEMIC
    High Altitude Cooking | Food Safety and Inspection Service

    TIER A

  2. 2 · climate.govACADEMIC
    Climate Change: Global Sea Level

    TIER A

  3. 3 · lamont.columbia.eduACADEMIC
    Lamont in the Media

    TIER A

  4. 4 · terpconnect.umd.eduACADEMIC
    Boiling Point

    TIER A

  5. 5 · en.wikipedia.orgWEB
    Boiling point

    TIER B

  6. 6 · britannica.comWEB
    When does water boil?

    TIER B

  7. 7 · pewresearch.orgWEB
    Does water's boiling point change with altitude? Americans ...

    TIER B

  8. 8 · brainly.comWEB
    Water boils at 100 degrees Celsius at sea level.

    TIER B

  9. 9 · philosophy.stackexchange.comWEB
    Is "water boils at 100 degrees Celsius" both a sufficiency ...

    TIER B

  10. 10 · homework.study.comWEB
    Water boils at 100 degrees Celsius at sea level. If ...

    TIER B

  11. 11 · compoundchem.comWEB
    What Temperature Does Water Boil At? Boiling Point & ...

    TIER B

  12. 12 · ebsco.comWEB
    Boiling points | Science | Research Starters | EBSCOhost

    TIER B

VERDICT TOTALTRUE ✓
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