The Standard Plate Count (SPC), also known as the aerobic plate count or total viable count, is one of the most widely used microbiological tests in the food industry. It measures the total number of live bacteria in a food sample, giving an indication of its general microbial quality and hygiene during production, processing, and storage.
Although the SPC does not identify specific pathogens, it provides valuable insight into the overall cleanliness of food handling systems and helps verify whether products meet food safety and shelf-life expectations. For Australian food businesses, the SPC is an important part of quality assurance and regulatory compliance.
Why Standard Plate Count Matters in Food Safety
A high SPC result does not automatically mean a product is unsafe, but it often signals poor hygiene, spoilage risk, or potential contamination. SPC testing is used to:
- Monitor the effectiveness of cleaning and sanitation programs.
- Verify Good Manufacturing Practice (GMP) and HACCP-based food safety systems.
- Assess product shelf life and storage conditions.
- Provide early warning of potential microbiological hazards.
In combination with specific pathogen testing, SPC results allow businesses to maintain control over their food safety programs and protect consumer health.
The Australian Standards and Regulatory Framework
In Australia, the Food Standards Code administered by Food Standards Australia New Zealand (FSANZ) sets microbiological limits for specific foods and organisms. While SPC itself is not always prescribed as a regulatory limit, it is frequently included in:
- Industry guidelines and codes of practice, such as those for dairy, meat, and ready-to-eat foods.
- Export certification requirements, where importing countries demand evidence of microbiological quality.
- Retailer specifications, with supermarkets often requiring SPC results within set limits before accepting products.
Regulators and auditors commonly expect SPC monitoring as part of a HACCP-based Food Safety Program.
Foods Commonly Tested for Standard Plate Count
SPC testing is applied across a wide range of foods, including:
- Dairy products such as milk, cheese, yoghurt, and cream.
- Meat and poultry products, both raw and processed.
- Seafood and aquaculture products.
- Fruits, vegetables, and juices.
- Bakery and confectionery items.
- Ready-to-eat foods and convenience meals.
Interpreting Standard Plate Count Results
SPC results are expressed in colony-forming units per gram (cfu/g) or per millilitre (cfu/mL).
- Low counts generally indicate good hygiene and product quality.
- Moderate counts may be acceptable depending on the food type, shelf life, and processing method.
- High counts often point to spoilage, poor sanitation, temperature abuse, or process failures.
Acceptable limits vary by product category, intended use, and customer or export requirements.
Control Measures for Food Businesses
Hygiene and Sanitation
- Implement effective cleaning and sanitising programs for equipment and facilities.
- Prevent cross-contamination between raw and ready-to-eat products.
Temperature and Storage Control
- Maintain cold chain storage at ≤5 °C for chilled products.
- Use correct hot-holding and cooling procedures to limit bacterial growth.
Supplier and Ingredient Verification
- Test raw materials routinely to assess baseline microbial loads.
- Work only with suppliers who provide consistent microbiological quality.
Staff Training and Practices
- Train staff in hygiene practices, including handwashing and protective clothing.
- Reinforce GMP principles throughout the production process.
Testing for Standard Plate Count
SPC testing is a quick, cost-effective way to monitor overall microbial quality in food. It is commonly used as:
- Routine monitoring to verify hygiene controls.
- Shelf-life studies to determine product stability.
- Audit and compliance evidence for regulatory and retailer requirements.
By regularly conducting SPC tests, businesses can spot trends, detect early issues, and implement corrective actions before products reach consumers.
Action Checklist for Compliance
- Include SPC monitoring in your HACCP or quality assurance program.
- Establish acceptable limits based on product type and regulatory/retailer requirements.
- Conduct routine SPC testing on both raw materials and finished products.
- Investigate and resolve high counts with corrective actions.
- Keep detailed records to demonstrate compliance during audits.
Book Your Standard Plate Count Test
Contact us to book your Standard Plate Count test for AUD 24.50.
- Email us: info@testneeds.com.au
- Call us: 03 9115 8105
