Workplace Contamination

Workplace contamination is the introduction or transfer of biological, chemical or physical hazards into a food-preparation environment. Contamination may originate from employees, raw ingredients, equipment, water, pests, building conditions or cleaning chemicals. It can affect food, food-contact surfaces, utensils and storage areas.

Types of contamination

• Biological: bacteria, viruses, parasites, moulds or other microorganisms.
• Chemical: cleaning agents, sanitiser residues, lubricants, pesticides or undeclared allergens.
• Physical: glass, metal, plastic, jewellery, packaging fragments or other foreign objects.
• Allergen cross-contact: unintended transfer of an allergen from one food or surface to another.

Common workplace sources

Examples include an employee touching their face and then handling ready-to-eat food, raw poultry juices contacting a clean work surface, a leaking roof dripping onto a prep area, chemicals stored above food, or a damaged utensil shedding fragments. Poor handwashing, inadequate sanitation and incorrect storage can increase risk.

Prevention and control

Controls include hand hygiene, staff illness policies, separation of raw and ready-to-eat foods, allergen management, approved chemical storage, pest control, equipment maintenance, cleaning and sanitising, and routine facility inspections. Contamination events should be contained, affected food assessed and corrective actions documented.

Example: if a leaking roof drips onto a prep table, stop food preparation, protect or discard affected food as appropriate, clean and sanitise the area, and report the maintenance issue.

Chef’s tip: train staff to recognise contamination sources and stop work immediately when a hazard is identified. Do not simply wipe away contamination and continue without assessing the affected food and area.