Legionella Awareness Training for Healthcare and Care Settings

Legionella bacteria occur naturally in water, but they become dangerous when they multiply in the storage tanks, pipework and showers found in every care home and healthcare building. For services caring for older or medically vulnerable residents, this is not a minor housekeeping issue — it sits alongside CQC's premises and equipment requirements as a core part of keeping a building safe to live and work in. This article sets out what legionella is, why care and healthcare premises are considered higher-risk, the UK legal framework that applies, and who in your organisation needs legionella awareness training.

What Is Legionella, and Why Are Care Settings Higher-Risk?

Legionella bacteria are found widely in natural water sources such as rivers and ponds, usually in low numbers that pose little risk. The problem arises in artificial water systems — hot and cold water tanks, calorifiers, pipework, showerheads, spa baths and cooling systems — where water can sit at temperatures between roughly 20°C and 45°C for extended periods. That range allows the bacteria to multiply rapidly, particularly where there is stagnation, scale, sludge, rust or biofilm to feed on.

People are infected by inhaling fine water droplets (aerosols) containing the bacteria, for example from a shower, tap outlet or spray. This can cause Legionnaires' disease, a serious and potentially fatal form of pneumonia, as well as the milder Pontiac fever. Most healthy people who are exposed do not become ill, but risk increases significantly with age, smoking history, chronic respiratory or heart conditions, diabetes, and weakened immune systems — a profile that describes a large proportion of residents in care homes, nursing homes and healthcare facilities. Combine that vulnerable population with extensive hot and cold water networks, multiple showers, and sometimes underused outlets in unoccupied rooms, and it is easy to see why the Health and Safety Executive (HSE) treats health and social care premises as a higher-risk category for legionella control.

The UK Legal Framework You Need to Know

Legionella control in care and healthcare settings is not guidance you can choose to follow loosely — it is underpinned by law. The starting point is the Health and Safety at Work etc. Act 1974, which places a general duty on employers to ensure, so far as is reasonably practicable, the health, safety and welfare of employees and anyone else who could be affected by their work — including residents, visitors and contractors exposed to water system risks.

Sitting underneath that is the Control of Substances Hazardous to Health Regulations (COSHH) 2002, which specifically require employers to assess the risk from hazardous substances — and legionella bacteria fall within COSHH's scope — and to prevent or adequately control exposure to them.

The practical detail on how to meet these legal duties comes from the HSE's Approved Code of Practice, ACOP L8: "Legionnaires' disease — The control of legionella bacteria in water systems," supported by the technical guidance in HSG274. ACOP L8 has special legal standing: while it is possible in principle to comply with the law by another equivalent route, following L8 is treated as demonstrating compliance, and failing to follow it without an alternative equally effective approach can be used as evidence of a breach in court. For health and social care premises specifically, the HSE's own sector guidance sets out control measures such as keeping stored hot water at 60°C or above, distributing it so it reaches 50°C within a set time, keeping cold water storage below 20°C, and flushing infrequently used outlets regularly — all measures aimed at keeping the bacteria below the temperature range in which they thrive.

What Duty Holders and Responsible Persons Must Do

Under COSHH and ACOP L8, the person or organisation in control of the premises — the "duty holder," often called the "responsible person" in a care setting — has a defined set of obligations:

• Identify and assess risk. A written legionella risk assessment must identify where water is stored or used, where conditions could allow bacteria to grow, and who could be exposed.
• Prepare a written scheme for controlling risk. This documents how the risk will be managed day to day — who is responsible, what checks are carried out, and at what frequency.
• Implement, manage and monitor precautions. This typically includes routine temperature checks at sentinel outlets and calorifiers, visual inspections of tanks, descaling and cleaning of shower fittings, and flushing of outlets that are not used regularly.
• Keep clear records. Risk assessments, the written scheme, monitoring results, remedial actions and staff training should all be documented and retained, both to manage risk day-to-day and to demonstrate compliance if the HSE or CQC ask to see evidence.
• Review regularly. The risk assessment should be reviewed periodically and whenever something changes — a refurbishment, an extended void period, a new water system, or a case of illness linked to the building.

In many care organisations, day-to-day responsibility is delegated to a facilities or maintenance lead, with the registered manager retaining overall accountability for ensuring the scheme is actually followed.

Who Needs Legionella Awareness Training?

Legionella awareness training is not just for specialist water-hygiene contractors. Anyone whose role touches the building's water systems, or who holds responsibility for premises safety, should understand the basics of how legionella risk arises and what to do about it. That typically includes:

• Facilities, maintenance and estates staff who carry out or record temperature checks, flushing and descaling.
• Care home and healthcare service managers who hold overall responsibility for the safety of the premises, even where they delegate day-to-day tasks.
• Anyone directly involved in inspecting, testing or servicing hot and cold water systems, showers or other outlets.
• Health and safety leads who need to understand the control regime well enough to audit it and report on it confidently.

Good training covers how legionella bacteria grow, the specific risk factors present in a care or healthcare building, the legal duties under COSHH and ACOP L8, and the practical monitoring and record-keeping tasks staff are expected to carry out. Because water safety intersects with several other premises-related duties, many providers structure this alongside related modules — for example fire safety training for healthcare staff, another area where premises risk and staff competence go hand in hand. Building this into a structured CPD training programme makes it far easier to track who is trained, when refreshers are due, and whether evidence is ready for inspection.

How This Links to CQC Premises and Safe Care Expectations

For CQC-registered services in England, legionella control connects directly to two of the fundamental standards. Regulation 15 (premises and equipment) requires that premises are clean, secure, suitable for their purpose, and properly maintained — a water system that has not been risk-assessed or monitored falls short of this standard regardless of how the rest of the building looks. Regulation 12 (safe care and treatment) requires providers to assess risks to people's health and safety and to do all that is reasonably practicable to mitigate them, which explicitly covers the proper and safe management of water systems as part of infection prevention and control. Inspectors reviewing either regulation may ask to see a current legionella risk assessment, the written scheme, and monitoring records, so keeping this documentation current is as much a CQC readiness issue as a legal one. Because water hygiene and infection control overlap so closely, it is also worth reviewing legionella controls alongside broader infection prevention and control training rather than treating the two as unrelated topics.

Frequently Asked Questions

Is legionella training a legal requirement in care homes?

The law does not name a specific qualification, but the Health and Safety at Work etc. Act 1974 and COSHH 2002 require duty holders to ensure that anyone managing or carrying out legionella-related tasks is competent to do so. In practice, that means staff responsible for water system checks and premises safety need appropriate awareness training to meet that legal duty.

How often should legionella risk assessments be reviewed?

ACOP L8 does not set a fixed calendar interval; instead it should be reviewed regularly and without delay whenever there is reason to suspect it is no longer valid — for example after building work, a significant change in water system use, a period where parts of the building were unoccupied, or if a case of Legionnaires' disease is linked to the premises.

Who is the "responsible person" for legionella in a care setting?

This is the duty holder in control of the premises — often the registered manager or provider organisation — who may delegate day-to-day monitoring tasks to facilities or maintenance staff but retains overall accountability for ensuring the written scheme is followed and kept up to date.

Does legionella control overlap with CQC inspections?

Yes. Inspectors assessing Regulation 15 (premises and equipment) and Regulation 12 (safe care and treatment) can ask to see your legionella risk assessment, written scheme and monitoring records as evidence that water systems are being safely managed.

Legionella control is a straightforward, well-documented process once the right people understand their responsibilities — the risk comes from treating it as a one-off task rather than an ongoing routine.