Ensuring the safety and well-being of students and staff is a priority for schools, colleges, and universities throughout the year. One critical aspect of this responsibility is managing the risk of Legionella bacteria, particularly during periods of reduced activity like school holidays. This article explores practical ways to minimize Legionella risks and keep water systems safe, focusing on prevention and proactive measures during low-usage periods.

What Is Legionella, and Why Is It a Risk?

Legionella bacteria thrive in warm, stagnant water. While water systems are often designed with safety in mind, long periods of inactivity—like end-of-term breaks—can increase the chance of contamination. Without regular water flow, stagnant conditions can develop, creating the perfect environment for Legionella to grow.

Practical Tips for Managing Legionella Risks

1. Keep Water Moving
   Regular water circulation is crucial. Stagnation allows Legionella to grow, especially in water temperatures between 20–45°C. Make sure taps, showers, and other outlets are used regularly or flushed out to keep the water moving.
2. Control Temperatures
   • Cold water should stay below 20°C.
   • Hot water should be stored above 60°C and delivered at no less than 50°C at the outlet.
     These temperature ranges make it harder for Legionella to survive and multiply.
3. Flushing During Breaks
   During holidays or other quiet periods, flushing water systems is a must. Outlets that aren’t used daily should be flushed at least once a week. If there’s a history of Legionella in the building, daily flushing may be necessary.Tip: A contractor or water management expert can help you create a tailored flushing schedule to suit your needs.
4. Follow Expert Guidance
   Refer to the HSG274 Part 2 Guidelines, which offer practical advice for managing water systems in buildings with low or intermittent use. These guidelines are particularly useful for holiday periods when water usage naturally drops. You can access the full document here.
5. Regular Risk Assessments
   A Legionella risk assessment acts as a roadmap for identifying vulnerabilities in your water system. It helps you understand where potential risks exist and whether current safety measures are working effectively.
6. Maintain and Clean Systems
   After long periods of inactivity, water systems should be flushed, cleaned, and disinfected before being used again. Regular maintenance keeps systems safe and prevents any buildup of bacteria.

Why It Matters

Managing Legionella risks might seem technical, but it’s all about ensuring clean, safe water for everyone who uses the space. Regular checks, proper flushing, and keeping temperatures in the right range are simple yet effective steps that go a long way in reducing risks.

If you’re unsure about your current approach or need professional advice, feel free to contact us at 01454 417 920 or send an email to sales@dantek.co.uk. We’re here to help you keep your water systems safe, even during quieter times of the year.