What is the maximum temperature that a walk-in cooler should be?

The maximum temperature that a walk-in cooler should be is at or below 40°. This temperature is crucial for food safety, as it inhibits the growth of bacteria that can thrive in warmer conditions. Keeping the temperature at or below this threshold ensures that perishable items, such as meats, dairy, and ready-to-eat foods, remain safe for consumption.

Foods stored above 40° can enter the "danger zone" where bacterial growth can double in number in as little as 20 minutes. Therefore, maintaining a cooler at or below 40° is essential for protecting public health and ensuring the quality and safety of the food served in environments like a deli.