Hot temperatures can kill most germs — usually at least 140 degrees Fahrenheit. Most bacteria thrive at 40 to 140 degrees Fahrenheit, which is why it's important to keep food refrigerated or cook it at high temperatures. Freezing temperatures don't kill germs, but it makes them dormant until they are thawed.

At what temperature can you kill bacteria?

The World Health Organization (WHO) notes that bacteria are rapidly killed at temperatures above 149°F (65°C). This temperature is below that of boiling water or even a simmer.

How long does it take heat to kill bacteria?

For temperatures above 65°C (149°F) is expected to cause near complete inactivation with exposures greater than 3 minutes. For temperatures between 55 and 60°C (131‐140°F) heating should last 5 minutes or more. However, for temperatures in the range 50‐55°C (122‐131°F) we recommend 20 minutes or longer of exposure.