Preventing Cross-Contamination in a Commercial Kitchen
Cross-contamination — the transfer of bacteria or allergens from one food (or surface) to another — is a leading cause of foodborne illness and a key focus of any food-safety inspection. These practical steps reduce the risk in a busy kitchen.
Separate Raw and Ready-to-Eat
The single biggest win is keeping raw proteins away from ready-to-eat foods at every stage: storage, prep and service. Dedicated equipment per food group makes this easy to follow and easy to audit.
Use Colour-Coded Equipment
- Colour-coded cutting boards for each food group
- Dedicated utensils per buffet dish during service
- Clearly labelled, separated storage for raw and cooked items
See our guide to HACCP cutting board colours for the full system.
Storage, Cleaning & Habits
Store raw meat below ready-to-eat foods so drips can’t contaminate, sanitise boards and surfaces between tasks, store boards upright to dry fully, and reinforce handwashing between handling raw and cooked foods. Replace deeply scored boards, since grooves harbour bacteria.
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Storage: Order in the Fridge Matters
How you stack a fridge is a major contamination control. Store ready-to-eat foods on top, then raw fish, then raw whole cuts of meat, with raw poultry on the bottom — so no raw juices can drip onto food that will not be cooked again. Keep everything covered and labelled.
Apply the same separation logic to dry storage and prep: dedicated zones and equipment for raw versus ready-to-eat keep risks apart at every stage.
Staff Habits That Prevent Contamination
Equipment helps, but behaviour closes the loop. Reinforce handwashing between handling raw and cooked foods, sanitising surfaces and boards between tasks, and never reusing a utensil across food groups during service.
- Wash hands between raw and ready-to-eat tasks
- Sanitise boards and surfaces between tasks
- Use one dedicated utensil per dish during service
- Store raw below ready-to-eat in the fridge
Frequently Asked Questions
What is the correct fridge storage order?
Ready-to-eat foods on top, then raw fish, then raw whole meat, with raw poultry on the bottom shelf, so raw juices cannot drip onto ready-to-eat items.
What are the main types of cross-contamination?
Bacterial (raw to ready-to-eat), allergen (traces transferring between foods) and physical (foreign objects). Separation, cleaning and dedicated equipment address all three.
How do colour-coded boards help?
They give each food group its own board, removing a major transfer point between raw and ready-to-eat foods and making correct practice easy to follow and audit.
