What temperature must freezers be maintained at for proper food storage?

For proper food storage, freezers must be maintained at 0 degrees Fahrenheit. This temperature ensures that food is kept frozen solid, which is crucial for preventing bacterial growth and preserving the quality and nutritional value of the food. When food is stored at this temperature or lower, it becomes effectively preserved for a longer time, reducing the risk of spoilage or foodborne illness.

While some other temperatures listed may still keep food cold, they do not maintain the consistent freezing necessary for safe long-term storage. For example, 32 degrees Fahrenheit is the temperature at which water freezes, meaning food is not fully frozen, and there is a risk of thawing and refreezing which can compromise food safety. The temperature of 20 degrees Fahrenheit is also not low enough to ensure food remains safely frozen, and -10 degrees Fahrenheit is colder than necessary; while it can safely store food, it could potentially lead to freezer burn or dehydration in some cases. Therefore, 0 degrees Fahrenheit is the optimal temperature for maintaining food quality and safety in freezers.