PREVRA Danger Zone for Food Poster: The Temperature Range Where Bacteria Multiply Fastest
A visual guide to the danger zone — 5°C to 63°C — where foodborne bacteria grow most rapidly. Every UK food business must train staff to understand and manage this critical temperature band.
Why the danger zone concept underpins every food safety decision you make
The danger zone is the temperature range between 5°C and 63°C. In this band, pathogenic bacteria can double in number every 20 minutes. A single bacterium at noon becomes over 2 million by 7pm if food is left in the danger zone. This exponential growth is invisible — the food looks, smells and tastes normal right up to the point it makes someone ill.
Every SFBB safe method — cooking, cooling, hot holding, cold holding, reheating — is fundamentally about controlling the time food spends in the danger zone. Your EHO will assess whether your team understands this concept, not just whether they follow procedures by rote. A team that grasps the danger zone makes better decisions under pressure.
Training your team to think in terms of temperature and time, not just temperature
Print this poster and display it prominently — it is as important as your health and safety law poster. Use it during induction training and team briefings. The key message is not just the temperature numbers but the time factor: food that has been in the danger zone for less than 90 cumulative minutes may still be safe, but every minute counts.
Pair this visual reference with active temperature monitoring. Digital SFBB gives you real-time visibility: staff log temperatures from any device, the system calculates cumulative danger zone exposure, and alerts prompt corrective action before food becomes unsafe. See also our Cooking Temperature Chart and Food Cooling Poster for managing temperature through every stage.
Prevra · Early access
Prevra is building a digital SFBB app.
The app is not ready yet. See the planned features and contact us about early access.
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