If scalding is a concern, a temperature mixing valve can be installed at water fixtures. It is important to note that there is a potential concern for legionella in water systems, as such, there are minimum temperatures that should be maintained.
Commercial dishwashers: If using a commercial dishwasher, dishwashing and sanitizing can occur either with hot water sanitizing (minimum temperature of 82°C) or chemical sanitizing. Booster heaters may be purchased to use with a commercial high-temperature dish washer if the regular water source produces insufficient water temperatures. Manufacturers may have a minimum water supply temperature required in order to maintain appropriate temperatures for the dishwasher cycles or for booster heater performance.
With chemical sanitizing, the water temperature does not need to get as hot. For more information, please see: Commercial Dishwashing Specifications: Guideline for Mechanical Warewashing in Food Service Establishments (PDF, 313KB, BCCDC).
Residential (non-commercial) dishwashing: A residential dishwasher may also be used to effectively clean and sanitize dishes if it is certified to “NSF/ANSI 184: Residential Dishwashers”. This standard helps confirm that a residential dishwasher can achieve a minimum 99.999 percent or 5-log reduction of bacteria when operated on the sanitizing cycle. For more information, please visit Dishwasher Certification.
Manual dishwashing: For manual dishwashing, a 3-compartment sink is needed. The water temperature would need to reach a minimum temperature of 44°C if there is a final (chemical) sanitizing step. If relying on temperature to sanitize, the requirement is for at least 30 seconds in water at a temperature of at least 77°C. For more information, please see: Food protection (PDF, 753KB, BCCDC).
For more food safety information, visit the Food safety page