What must be the temperature of the sanitizing rinse in a mechanical dishwasher?

The temperature of the sanitizing rinse in a mechanical dishwasher is critical for effectively eliminating pathogens and ensuring proper sanitation of dishes and utensils. A sanitizing rinse temperature of 165°F is recognized by health regulations as sufficient for achieving the necessary level of microbial reduction in food service settings. This temperature is vital in maintaining hygiene standards and preventing foodborne illnesses.

While higher temperatures, such as those listed in the other options, may enhance sanitization, they are often unnecessary for achieving the required sanitation level and can pose risks such as damage to equipment or the items being sanitized. Maintaining the rinse at 165°F strikes a balance between effective sanitation and practical operation within food service environments.