This guidance covers the legionella risk review, temperature checks at outlets and tanks, flushing and what goes in the legionella management plan.
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Further guidance on legionella and water systems:
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Legionella Safety Guidance
A general guidance document on legionella safety, for the people responsible for the water systems in the premises. It explains how legionella and Legionnaires' disease arise, how the water system is reviewed for risk factors, the outlet and tank checks, flushing and other controls, and what goes in the legionella management plan.
Topics Covered
- Legionella and Legionnaires' disease - how the disease is caught, and the warm, stagnant or sprayed water conditions that raise the risk
- Managing legionella risk - reviewing the water system to identify risk factors and recording them on a risk review or risk assessment
- Water system and dead legs - a plan of the whole water system, and removing dead legs and redundant pipework where water stagnates
- Checking outlets - cold and hot water temperature checks at each outlet, with the points that trigger action, and water quality checks
- Water tank checks - periodic inspection of tanks for damage, contamination and temperature, with draining, cleaning and disinfecting where needed
- Other risk factors - infrequently used outlets, higher-risk systems such as showers, unoccupied periods, activities that create spray and changes to the system
- The legionella management plan - recording the controls, monitoring, checks and responsibilities, a schematic of the system, and planned risk reviews by a competent person
Who Is It For?
Managers and responsible persons who look after the water systems in the premises, and anyone who carries out the checks, flushing or cleaning.
Using the Guidance
Give it to the responsible person for your water systems and anyone carrying out checks or flushing, and keep it as a reference alongside your legionella records. Record who has received it, for example on the training matrix.
Temperature Checks at Outlets and Tanks
The guidance gives clear points that trigger action. Cold water above 20°C after running for up to two minutes, or hot water that does not reach at least 50°C within one minute, needs correcting. Tanks are checked for hot water below 60°C, cold water above 20°C, damage, loose lids, sludge and missed draining or cleaning.
Adapting the Guidance
Edit the guidance to match your own arrangements - the responsible person for your water systems, the outlets and tanks in your premises, any higher-risk systems such as showers or eye wash stations, and your flushing routine.
Related Documents
Other documents that work alongside this guidance:
Flushing Outlets and Empty Premises
Infrequently used outlets are run weekly for at least two minutes, and after the premises have been unoccupied for more than two weeks all outlets are flushed safely, avoiding spray. For planned closures such as holidays, weekly flushing of all outlets reduces the risk.
Would you rather we prepared it for you?
A day of remote support can take the risk assessments you already have, move them into one consistent format with the same scoring throughout, and build your hazard register from them, so the hazards this guidance covers are backed by a current assessment.
Risk Assessment Reformatting and Hazard Register