How long should milk be boiled to make it safe for consumption?
We found no official source that gives a boiling time for raw milk. Alberta Health Services gives tested home pasteurization settings instead: heat milk to 63 C (150 F) for at least 30 minutes or 72 C (162 F) for at least 15 seconds, in a double boiler with a thermometer. Ireland's food safety agency says to boil raw milk but gives no time.
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In this article
Is there an official boiling time?
We did not find one. The Food Safety Authority of Ireland (FSAI) advises not to drink raw milk without boiling it first and says “you can boil the milk,” but gives no temperature or time. We will not invent one.
What do health authorities give instead?
Alberta Health Services describes home pasteurization with a double boiler and cooking thermometer:
- Heat the milk slowly, stirring often.
- Hold it at 63 C (150 F) for at least 30 minutes, or 72 C (162 F) for at least 15 seconds. If it drops below target, start timing again.
- Cool it quickly in an ice water bath to 20 C (68 F) or cooler.
- Pour into sterilized containers and refrigerate at 4 C (40 F) or colder. It can be stored in the fridge for 2 weeks.
It also says a microwave cannot be used to pasteurize milk because you cannot control the temperature.
Why is raw milk risky?
FDA says pasteurization is the only method to completely eliminate vegetative pathogens, and that raw milk can carry E. coli O157:H7, Salmonella, Campylobacter and Listeria. FSAI adds that harmful bacteria do not change the look, smell or taste of raw milk, and that infants, children, pregnant women, older people and people with chronic illness are more susceptible.
What is the safest choice?
CDC recommends choosing pasteurized milk and dairy products. If you only have raw milk, ask your local health department or a doctor for current advice.
What temperature does milk boil at?
Milk boils at about the same temperature as water, around 100 C (212 F) at sea level. A University of Illinois physics Q&A says milk is mostly water, so its boiling point is close to water’s, and that dissolved salts, sugar and other solutes raise it by a fraction of a degree. The answerer’s estimate is about 0.2 C. The exact figure also depends on air pressure.
What happens if you boil milk for a long time?
We found no official source on prolonged boiling. What we did read is from the Exploratorium’s cooking column: milk proteins that coagulate tend to scorch, the brown bits in a pan are likely coagulated whey proteins, and lactalbumin begins to coagulate as low as 150 F (66 C). It advises heating milk over very low heat, or briefly in a microwave, and stirring while it heats.
That page does not give a safe boiling time, which matches what this page says above: use the pasteurization settings or choose pasteurized milk.
People also ask
How long should you boil milk to make it safe?
No official source we found gives a boiling time. Alberta Health Services gives 63 C (150 F) for at least 30 minutes or 72 C (162 F) for at least 15 seconds for home pasteurization.
What temperature kills bacteria in milk?
Pasteurization settings are 63 C (150 F) held for 30 minutes or 72 C (162 F) held for 15 seconds, as listed by Alberta Health Services and FDA.
Can you pasteurize milk in the microwave?
No. Alberta Health Services says a microwave cannot be used because you cannot control the temperature.
What temperature does milk boil at?
About the same as water, around 100 C (212 F); a University of Illinois physics Q&A says dissolved solids raise it by a fraction of a degree, about 0.2 C by its estimate.
Sources
- Alberta Health Services (MyHealth.Alberta.ca): How to Pasteurize Milk, read 5 Nov 2026
- FSAI: Advice on raw milk, read 5 Nov 2026
- FDA: Raw Milk Misconceptions and the Danger of Raw Milk Consumption, read 5 Nov 2026
- CDC: Raw Milk, read 5 Nov 2026
- University of Illinois Physics Van: Boiling Point of Milk, read 5 Nov 2026
- Exploratorium: Science of Cooking, Ask the Inquisitive Cooks, read 5 Nov 2026
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