What Are Non-Potentially Hazardous Foods? [Australia Food Safety Guide]
Key Food Safety Takeaways
- Non-PHFs are shelf-stable foods that don’t require refrigeration.
- Examples: plain bread, crackers, soy sauce, pickles.
- PHFs like cooked rice or cream-filled pastries need strict temperature control.
- Good hygiene and sealed storage remain essential.
- Food handlers should complete accredited food safety training.
Introduction
Understanding food safety classifications in Australia is essential for anyone working in the food industry or preparing meals at home. This guide explains what non-potentially hazardous foods (non-PHFs) are, how they differ from potentially hazardous foods (PHFs), and why proper handling still matters for maintaining food safety.
What Are Non-Potentially Hazardous Foods?
Non-potentially hazardous foods (non-PHFs) are foods that do not require temperature control for safety. Under Australian food safety laws, these foods have characteristics that make them unlikely to support the growth of harmful bacteria or toxins, even when kept at room temperature.
Legal and Regulatory Definitions
According to the NSW Food Authority, non-PHFs are foods that remain safe without refrigeration or hot holding. Health Victoria explains that such foods often have:
- Low moisture content (water activity below 0.85)
- High acidity (pH below 4.6)
These properties inhibit the growth of pathogens, keeping food safe for longer periods.
PHFs vs Non-PHFs: Key Differences
| Factor | Potentially Hazardous Foods (PHFs) | Non-Potentially Hazardous Foods (Non-PHFs) |
| Water Activity (aw) | Above 0.85 | Below 0.85 |
| pH Level | Above 4.6 (low acid) | 4.6 or below (high acid) |
| Spoilage Risk | High if not refrigerated | Low at room temperature |
| Storage | Requires refrigeration or hot holding | Safe at ambient temperature |
Examples of Non-Potentially Hazardous Foods in Australia
Non-PHFs are typically shelf-stable and have properties that prevent microbial growth. Common examples include:
Baked Goods and Breads (Unfilled)
- Plain loaves of bread
- Unfilled croissants
- Plain muffins and scones
Note: Once filled with custard, cream, or meat, these items become PHFs.
Confectionery and Lollies
- Hard candies
- Chocolate bars
- Sugar-based sweets
Low moisture makes these products stable at room temperature.
Preserved and Pickled Foods
- Vinegar-pickled vegetables (pickles, olives)
- Fermented foods with high acidity
Acidic Condiments and Sauces
- Soy sauce
- Vinegar
- Mustard
- Commercial dressings
Dry and Shelf-Stable Packaged Foods
- Crackers
- Breakfast cereals
- Uncooked pasta and rice
Once cooked, these foods become PHFs due to increased moisture.
Why Are Non-Potentially Hazardous Foods Safer?
Low Water Activity and Microbial Growth
Micro-organisms require available water to thrive. Foods with water activity (aw) below 0.85 prevent this growth. Examples include crackers and lollies.
Role of pH in Food Safety
Foods with pH below 4.6 create an acidic environment that suppresses bacterial survival. Pickled and fermented foods naturally maintain this defence.
Food Handling and Storage Guidelines for Non-PHFs
Even though non-PHFs are low risk, safe handling practices are still vital.
Shelf Life and Label Reading
- Check best-before dates regularly.
- Follow storage instructions on packaging.
- Keep foods sealed to prevent contamination or pest infestation.
Hygiene in Handling and Cross-Contamination Risk
- Wash hands before handling any food.
- Keep non-PHFs away from raw meats and PHFs.
- Use clean utensils and surfaces.
Workplace Compliance
Businesses must ensure all food handlers receive food safety training. A Food Safety Supervisor (FSS) should document classifications and ensure compliance with regulations.
Grey Area Foods: When Classification Depends on Context
Some foods change classification depending on preparation and storage.
Foods That Change After Preparation
- Cooked rice and pasta: Once cooked, these are PHFs.
- Filled baked goods: Custard tarts or meat-filled pastries are PHFs.
Temperature Control and Display Duration
The 2-hour/4-hour rule applies to borderline foods:
- Up to 2 hours at room temperature – safe
- 2–4 hours – use with caution
- Over 4 hours – discard
Non-PHFs in the Workplace: What Employees Should Know
Understanding food classification helps workers in hospitality, retail, and catering maintain compliance. Even when working with non-PHFs, safe food handling is mandatory under Australian food safety laws.
FAQs
What is the definition of non-potentially hazardous food?
Food that does not require temperature control for safety because it cannot support the growth of pathogens.
Can non-PHFs go off or cause food poisoning?
Yes, if poor hygiene or cross-contamination occurs, even non-PHFs can cause spoilage or illness.
What are examples of shelf-stable non-hazardous foods?
Crackers, plain bread, chocolate bars, soy sauce, and pickles.
Is bread a non-potentially hazardous food?
Yes, plain bread is a non-PHF. Filled or topped varieties may be classified as PHFs.
Do non-PHFs need refrigeration?
No, but they must be stored properly and handled hygienically.
Can non-PHFs be served in buffets without temperature control?
Yes, provided that safe handling practices are followed.
What is the difference between pH and water activity?
pH measures acidity, while water activity measures available moisture for microbial growth.
How do I know if a food is classified as non-PHF?
Consult Australian food safety guidelines or trained professionals for proper classification.
Do I need food safety training to handle non-PHFs?
Yes. Food safety knowledge ensures proper hygiene and compliance with Australian regulations.
Can cooked rice be considered a non-PHF?
No. Cooked rice has high moisture and must be treated as a PHF.
