When schools close for the holidays, the water pipes can become forgotten. While buildings sit quietly, water stops moving. That still water is perfect for Legionella bacteria to grow. We need to keep up water hygiene even when no one is around. It’s about health and safety, and about being ready for students and staff when the term starts again.
Why Managing Legionella Risk During School Holidays Matters?
When a school is empty for weeks, water outlets go unused. That means cold water may warm up and hot water systems may cool. Without water flow, waterborne bacteria can multiply quickly. Legionella bacteria thrive in these conditions. Breathing in droplets from taps or showers could lead to illness.
Schools must guard against this by planning ahead. Managing Legionella risk in schools means keeping water systems safe even during holiday periods. It helps keep staff and students healthy and shows responsible people are taking water safety seriously.
4 Key Risks in Vacant Educational Facilities
Empty schools come with hidden dangers. With no regular use, pipes and tanks can become a breeding ground for bacteria. Legionella grows best in still water. An unused shower or tap can allow bacterial growth in days.
Temperature matters too. Warm pipes in summer can speed up bacterial growth. Fluctuating hot water systems don’t help either. Disruptions in water supply also cause problems if not followed by a flushing protocol. These are risks that need checking before term restarts.
- Stagnant Water: Stagnant water is a key issue when buildings stand empty. Pipes, tanks, and outlets hold water that doesn’t move. That water loses chlorine and grows bacteria. Even occasional-use taps in science labs or mobile classrooms are risky. They often get forgotten. To stop it, all water outlets (even the rarely used ones) need flushing at least once a week during shutdowns.
- Infrequent Maintenance: Just because a school is shut down, it doesn’t mean maintenance should stop. Without it, small faults, like a blocked tap or broken valve, can go unnoticed. A well-kept water management plan should include regular checks during summer. That prevents small issues from becoming bigger and keeps the water system safe.
- Inadequate Temperature Control: Legionella thrives around 20–45 °C. That means cold water must stay below 20 °C and hot water above 50 °C. During school holidays, hot water systems might cool down, and cold water could warm up. Checking temperatures at outlets is vital. Guessing by touch isn’t enough. Schools should log these readings to show compliance with water hygiene standards.
- Disruption of Water Supply: Any interruption (planned or accidental) can cause pressure changes or contamination. After a disruption, water can stagnate in parts of the system. Schools need to include flushing and checks as part of their water management during any disruption. That helps protect water outlets and keeps education estates safe.
Effective Legionella Risk Management and Prevention
Preventing bacterial growth is possible with a clear plan. Schools should take action before a problem shows up.
A strategy that includes flushing, monitoring, cleaning, and maintenance can work wonders. That plan keeps the water system safe for staff and students, even after long vacations.
Prevent Stagnation
The simplest defence is regular flushing. Run all taps, showers, and fountains long enough to flush out old water.
Make a weekly list of all outlets, even the infrequently used ones. That ensures no spot is forgotten during holiday periods. Always check off tasks to stay organised.
Temperature Control
Keeping water at the right temperature is crucial. Cold water must stay below 20 °C and hot water above 50 °C.
Schools should test regularly and log readings for each outlet. Consistent monitoring deters Legionella bacteria and proves the system is safe.
HSG274 Guidelines
HSG274 Part 2 offers practical advice for managing hot and cold water systems. It explains how to flush, clean tanks, and monitor temperatures.
Following these guidelines helps the duty holder and responsible person meet legal water hygiene duties. It shows that the school takes safety seriously and uses an approved approach.
Flushing Protocol
Flushing outlets takes simple effort. Run each tap or shower for at least two minutes. That clears stagnant water and brings a fresh supply.
Both cold and hot taps need flushing. Record the date, time, and who did it. A paper trail shows the school did its part to protect health and safety.
Legionella Risk Assessment
Legionella risk assessments are a legal must for every school. A trained person checks the water system, finds weak points, and suggests actions.
These assessments should be reviewed annually or after significant system changes. It helps keep records clear and the school safe.
System Maintenance
Regular care keeps systems safe. This includes cleaning water tanks, finding leaks, and replacing broken valves.
Even during holidays, these tasks should continue. A plan with schedules and checks will help staff and ensure all work is done on time.
Biofilm in School Water
Biofilm is a thin, sticky layer inside pipes. It hides Legionella and helps the bacteria multiply.
To tackle biofilm, schools need regular cleaning and flushing. They may also disinfect taps and showers so bacteria can’t thrive when staff and students return.
Schools’ Legal Responsibilities
Schools must manage water safety under health and safety laws. The duty holder and responsible person must make sure all water outlets are safe—even during holiday shutdowns. Failure to do so could lead to legal consequences.
Schools must:
- Conduct a Legionella risk assessment to find weak spots in the system.
- Establish a written scheme of control that states who does what and when.
- Implement and monitor control measures like flushing and temperature checks.
- Keep accurate records of all actions to show compliance.
These steps help schools manage water management and protect everyone who uses the estate.
7 Key Steps to Prevent Legionella Over the Summer
Schools need a clear plan to reduce Legionella risk over the break. These seven steps guide the way.
1. Conduct a Site-Specific Legionella Risk Assessment
Review your school’s assessment to include new spaces, like unused classrooms or buildings. This makes sure the plan matches reality and covers every water outlet.
2. Set Up a Flushing and Maintenance Schedule
Make a weekly plan detailing who will flush each outlet and when. This keeps everything organised during summer, especially with infrequently used water outlets.
3. Monitor Water Temperatures
Track hot and cold water temperatures regularly. Log these readings. Act quickly if water is within the Legionella growth range.
4. Clean and Disinfect Key Equipment
Summer is a good time to clean showerheads, taps, and tanks. Remove biofilm and kill bacteria. This helps keep water outlets safe for staff and students.
5. Remove Redundant Pipework
Reducing unwanted pipes such as dead legs removes places where water can stagnate. Removing redundant pipework means fewer risks and easier water hygiene control.
6. Consider Legionella Sampling
In high-risk areas or older buildings, take water samples before school reopens. This shows the system is clean and safe before the term starts again.
7. Train Your Team
Make sure the maintenance team knows the water management plan. Teach them about Legionella risk in schools and how to follow flushing, cleaning, and temperature control routines.
Preparing for Reopening in September
To get ready for September, schools should plan water checks before staff and students return.
- Re-inspect and flush all water systems so fresh water is in every pipe.
- Confirm all control measures are working, like temperature logs and flushing records.
- Carry out any necessary disinfection or sampling in case there were long shutdowns.
- Review and update risk assessments to reflect any changes made over the summer.
- Ensure records are complete and up to date, so there’s proof the school managed legionella risk properly.
Legionella Flushing Regime
A consistent flushing regime is the most effective step schools can take. Weekly flushing of all taps, showers, and water fountains clears standing water and helps avoid bacterial growth.
Assigning staff to outlets, keeping a log, and checking regularly makes sure water hygiene is maintained—even when no one is in the building.
Why Choose Comfort Services Group?
Comfort Services Group specialises in water hygiene and legionella risk management. We follow all HSG274 guidelines and help schools meet legal duty holder requirements. Our team sets up flushing plans, conducts risk assessments, and tests water for Legionella bacteria.
We make water safety easy for schools. That means more time for teaching and less worry about waterborne bacteria, cold water systems, or holiday downtime.
FAQs
Can Legionella be transmitted through drinking water in schools?
No, it cannot spread by simply drinking water. The risk happens when people breathe in small droplets from taps, showers, or fountains. Legionella grows in pipes when water outlets aren’t used and water hygiene slips. Avoiding still water and keeping maintenance saves everyone from risk.
Are temporary mobile classrooms or portable units at higher risk?
Yes, they are. These water outlets are often forgotten during shutdowns. Water can sit in pipes for weeks. That means users may face a bigger risk from legionella bacteria when they return. Regular flushing, temperature checks, and cleaning in these places is essential.
What are the signs of a Legionella problem in a school building?
Signs aren’t always obvious. But lukewarm cold water, scale on taps, or discoloured water might be warning signs of bacterial growth. Noticing these early and acting with flushing, cleaning, and maintenance helps prevent problems before students come back.
How to prepare your school’s water for after the summer holiday?
Make sure all outlets are flushed weekly during holiday periods. Check water temperatures and clean taps and showers. Before reopening, run everything through, test temperatures, and log results. These steps keep water management strong and everyone safe in September.
Is Legionella risk higher in older school buildings?
Very much so. Older estates often have outdated pipes, dead ends, or weak water flow. These areas encourage bacterial growth. Cleaning, flushing, and removing unused pipework are key to managing that higher risk. Maintenance and awareness make a big difference.
We are proud to share our experience and knowledge and take pride in offering this to all clients when required. If I, or one of the team can help then please schedule a meeting via the office or get in touch via one of our social media platforms.
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