Care Home Legionella Control: A Practical Guide for England
Legionella control in a care home comes down to five things: a named responsible person, a current risk assessment, a written scheme of control, routine checks that are recorded, and prompt action when a check fails. Residents are often older or unwell, so the water system needs closer attention than it would in an ordinary office. This guide sets out what the Health and Safety Executive (HSE) and the Care Quality Commission (CQC) expect, and how to turn that into a routine your team can keep up.
TL;DR
Someone must be assigned responsibility for Legionella control, and the care service stays responsible even if it does not own or manage the building.
A suitable risk assessment drives everything: a written scheme, temperature and flushing routines, and records. CQC expects it to be reviewed annually, or sooner after changes.
Where temperature control is used, hot water is stored at 60°C or above, distributed at 50°C or above, and cold water is kept below 20°C. Thermostatic mixing valves (TMVs) manage scald risk.
Sentinel outlet temperatures are checked monthly. Little-used outlets are flushed weekly. Showerheads and hoses are cleaned and descaled at least quarterly.
If a check fails, document it, escalate it, fix the cause, and record that the fix worked before normal use resumes.
Table of Contents
Why care homes need closer Legionella control
Legionella bacteria grow in water between 20°C and 45°C, particularly where it is stored or recirculated and where nutrients are present. HSE lists rust, sludge, scale, organic matter and biofilm as the kind of material that feeds growth. It also points to outlets that produce aerosols, such as showers and taps, because people become infected by breathing in fine droplets.
The same HSE page tells assessors to consider whether the people exposed are more susceptible because of age, illness or weakened immunity. That describes many care home residents. HSG274 Part 2 says care homes and other high-risk locations need particular consideration, and that the assessment should cover both Legionella and scalding.
Care homes also have features that make water management harder:
Rooms that are empty for days or weeks, so water sits in the pipework.
Several wings or extensions added over time, often with redundant pipework and dead legs.
En-suite showers and basins that individual residents rarely use.
Hot water kept cooler at the outlet to protect residents from scalds.
Staff turnover, which makes routines easy to lose.
None of these is unusual. They are simply the points a good assessment looks at first.
Who is responsible for Legionella control
The legal starting point is the Approved Code of Practice L8. It requires employers and people in control of premises to assess and control foreseeable exposure to Legionella. Where the risk cannot reasonably be avoided, they must put in place and manage a written control scheme.
HSE says the dutyholder must appoint a competent responsible person with enough authority, knowledge, skills and experience. Outsourcing the work does not hand over the responsibility: the dutyholder still has to make sure contractors carry out treatment to the required standard, and should check they can do so before engaging them.
CQC takes the same line for registered services. Its Legionella risk assessment guidance says services must assign someone responsible for Legionella control and complete the actions the assessment identifies. It treats the assessment as evidence relevant to Regulations 12 (safe care and treatment) and 15 (premises and equipment). A provider leasing its building from a landlord remains responsible.
For a closer look at the role itself, see our guide to what the responsible person must do. In practice, most homes name a registered manager or maintenance lead, give them time and training to do it, and name a deputy for absences.
What a care home risk assessment should cover
The risk assessment is the foundation. CQC describes what it should map: hot and cold systems, showers, taps, sinks, tanks, cylinders, TMVs and water-using appliances. It should identify stagnant or low-use areas, poor temperatures, corrosion, scale and dead legs, and cover inspection, testing, controls and records.
HSE adds that an assessment should identify management responsibilities, competent personnel and training, describe the water system, evaluate the hazards, specify controls, and set out monitoring, inspection, maintenance, results and review arrangements.
What a thorough site survey looks like
On a care home, expect the assessor to walk every floor and look at:
Water storage: cold water tanks, calorifiers and hot water cylinders, including lids, insulation and internal condition where accessible.
Distribution: pipe runs, dead legs and redundant pipework left from earlier refurbishments.
Outlets: every shower, tap and sink, with particular attention to rooms that are rarely used.
Control devices: TMVs, their positions and servicing history.
Existing records: temperature logs, flushing sheets, cleaning records and previous remedial actions.
Management: who is named, how they are trained and how work is recorded.
Our Legionella risk assessments start from £185 and are tailored to the site, so a single-building residential home and a multi-site group are scoped differently.
When to review it
CQC expects an annual review, or an earlier one after system changes, new residents, building alterations or suspected Legionnaires’ disease. HSG274 Part 2 frames the assessment as an ongoing process. Review it whenever it may no longer be valid: after changes to the water system or building use, when new information emerges, when controls prove ineffective, when key personnel change, or after a suspected associated case. Our note on reviewing a Legionella risk assessment gives practical triggers.
The written scheme of control
The risk assessment says what could go wrong. The written scheme says what you do about it. HSE Northern Ireland’s guidance on care homes, which restates the same L8 duties, says the scheme should state who does what and how, specify measures that keep the assessment effective, be clearly laid out and accessible, and have recommendations completed and signed off.
L8 lists what a scheme should contain:
An up-to-date schematic diagram of the system.
A description of safe operation.
Precautions, checks and their frequencies.
Remedial action when controls fail.
Cleaning and disinfection procedures.
Treatment parameters, where treatment is used.
Sampling locations and procedures.
Lines of communication and emergency procedures.
A scheme that sits in a folder is not a scheme. Put the weekly and monthly tasks on a schedule, tell the staff who carry them out what the limits are, and make sure they know who to call when a reading falls outside them.
Control measures that work in a care home
HSE’s guidance for hot and cold water systems in health and care settings gives the core measures where temperature control is the chosen method:
Measure | What HSE says |
Hot water storage | 60°C or higher |
Hot water distribution | 50°C or higher |
Cold water | Below 20°C |
Dead legs | Remove them |
Little-used outlets | Flush at least weekly |
Showerheads and hoses | Clean and descale at least quarterly |
Tanks and pipework | Keep clean |
TMVs | Fit close to outlets where a scald risk is identified |
Balancing Legionella and scalding
High stored temperatures protect against bacterial growth, but hot water at the tap can injure residents who cannot recognise heat or respond quickly. The two duties sit side by side. HSG274 asks for both to be assessed, and HSE’s guidance puts TMVs close to the outlet where scalding is a risk. That is how a home keeps stored water hot enough to control Legionella while delivering water at a safe temperature at the tap.
TMVs need servicing too. A neglected valve can become a scald risk or a place where bacteria collect, so they belong in the written scheme with a service interval. Our TMV servicing and remedial works cover this as part of ongoing compliance.
Keep water moving
Stagnation is the most common fixable problem in a care home. Assign flushing of unused rooms to a named person, record each flush, and add outlets to the list when a room becomes vacant. Where a room is likely to stay empty for long periods, discuss with your assessor whether pipework can be altered so that outlets do not sit unused.
Prevention before testing
HSE’s principle in L8 is to stop Legionella multiplying and to reduce exposure to aerosols. Sampling supports that, but it does not replace temperature control, cleanliness and flushing.
Monitoring, sampling and records
HSE’s health services guidance sets out a simple rhythm:
Task | Frequency |
Sentinel outlet temperatures | Monthly |
Hot water storage temperatures | Monthly |
Cold water tanks | At least every six months |
Flushing of little-used outlets | At least weekly |
Showerhead and hose cleaning and descaling | At least quarterly |
Water sampling | Periodic, set by the risk assessment |
L8 explains that monitoring must show the system operates correctly, accessible components are undamaged and clean, and any treatment remains effective. How often depends on the system’s characteristics, its complexity and how susceptible the users are. In a care home, that last factor usually pushes towards closer attention.
What sampling can and cannot tell you
HSE cautions in L8 that detecting Legionella is technically difficult. A negative result does not prove the bacteria are absent, and a positive result does not automatically prove a control failure, because Legionella can occur naturally. Results are one piece of evidence to read alongside temperatures, flushing logs and the condition of the system. Our Legionella water testing and analysis starts from £55 per sample, and the sampling plan should follow your risk assessment rather than a fixed calendar.
Records inspectors expect to see
HSG274 Part 2 says records should show accurately who did the work and when. CQC lists the kinds of evidence it expects: outlet-temperature checks, sampling where required, visual tank and pipework inspections, descaling schedules, maintenance logs, cleaning records and remedial-action plans. Keep the current risk assessment, written scheme and schematic diagram with them, as the HSE Northern Ireland care home guidance also says.
A tidy logbook does two jobs. It lets the person who covers a colleague’s holiday carry on seamlessly, and it gives an inspector or incident investigator a clear account of what was done.
Some homes use automated temperature monitoring to take the manual burden off monthly readings and to see problems between visits. We offer automated water temperature monitoring for sites that want continuous records.
What to do when a check fails
A low hot-water reading or a positive sample is not a reason to panic, but it does need a documented response. L8 requires prompt remedial action when monitoring or testing shows controls are ineffective, and the written scheme should already set out control limits, corrective measures, communication routes and emergency procedures.
A workable sequence, based on L8:
Record the failure: what was found, where and when.
Escalate it to the responsible person straight away.
Investigate the water system and the risk assessment to find the cause.
Restore effective control, whether temperature, flow, cleanliness or treatment.
Verify the result and record it before normal operation resumes.
CQC expects homes to complete the actions identified by the assessment and to review the assessment if Legionnaires’ disease is suspected. If a resident has symptoms such as pneumonia-like illness, speak to their GP or clinical lead and follow your infection prevention and local health protection arrangements.
Cleaning and disinfection of tanks and systems is a specialist task. Our tank cleaning, disinfection and maintenance contracts are there for when a system needs bringing back under control, or for a regular programme that prevents it getting that far.
Training the people who keep the system safe
Temperature checks and flushing are usually done by maintenance staff, but care and housekeeping teams notice things first: a shower that runs cold, a room no one has used for weeks, a tap that spits. HSE expects the responsible person to have the knowledge and experience for the role, and the risk assessment should cover training. Short, role-specific awareness sessions help everyone know what to report. Our Legionella awareness training is available on-site or online.
Choosing a contractor
Because the responsibility stays with you, choose a contractor you can hold to the standard. HSE says to check, before employing one, that they can do the work to the required standard. Ask what accreditations they hold, how they report, and whether they can tailor the work to a care setting rather than hand over a generic template. Ask how quickly you will get reports and quotes, because delay in getting a report is delay in acting on it.
How we can help
We are a water hygiene and Legionella compliance business working with healthcare, housing associations, commercial and other organisations across the UK. For care homes, the usual starting point is a bespoke risk assessment, followed by a written scheme, logbook, any remedial works, and ongoing support so your own team can keep the routine going.
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Risk assessments start from £185 and sampling from £55 per sample. For anything else, such as monitoring, training or remedial works, we quote to the site. To discuss your home, start at the Bespoke Compliance Solutions homepage.
Our perspective
Most of the care homes we meet are not neglecting Legionella. They are busy, and the routine slips because it depends on one person who also does ten other things. Our approach is to make compliance simple. We build the risk assessment around your actual building, then set up a control programme and logbook your team can run without a specialist in the room. Where it helps, we add automated temperature monitoring, awareness training and servicing of TMVs, so the system and the people looking after it are covered together. The best result is a home where the monthly temperatures, weekly flushing and annual review happen as a matter of course, and where a failed reading is handled in an afternoon with a clear record. That is what we aim to deliver, through ongoing support as much as one-off visits. Sammi
FAQ
How often should a care home have a Legionella risk assessment?
CQC expects the assessment to be reviewed annually, and earlier after system changes, new residents, building alterations or suspected Legionnaires’ disease. HSE also says to review it whenever it may no longer be valid. Keep a dated record of each review.
What temperatures should care home hot and cold water be kept at?
Where temperature control is used, HSE says to store hot water at 60°C or higher, distribute it at 50°C or higher and keep cold water below 20°C. Fit TMVs close to outlets where there is a scald risk so residents receive water at a safe temperature.
Does a care home need to test water for Legionella?
HSE says samples should be analysed periodically, with the frequency set by the risk assessment. Testing supports temperature control, flushing and cleaning rather than replacing them. A negative result does not prove the bacteria are absent.
Who is legally responsible if the care home does not own the building?
CQC says the care service remains responsible even if it does not own or manage the premises. HSE adds that outsourcing work does not transfer the dutyholder’s responsibility. Agree clearly with the landlord who carries out each task, and record it.
What should we do if a Legionella sample is positive?
Document the result, escalate it to the responsible person, investigate the system and the risk assessment, and carry out remedial action promptly. Record that controls have been restored before normal use resumes. Your written scheme should already set out the limits and who to contact.
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