Start here
You do not need a microbiology degree, you need the path that fits your situation. Pick the one below that sounds like you, and read it in order. Each ends with you knowing what to do next.
Tenant or member of the public
Worried about the water where you live or stay, or what your landlord should be doing.
- 01What is Legionella? An introduction to the bacteria and disease
Legionella only becomes your problem when warm water sits still and then gets breathed in, understand those two conditions and the whole subject gets simpler.
Basics & science · 5 min read
- 02Legionnaires' disease symptoms: early warning signs and when to see a doctor
A clear symptom-picture page (with NHS deferral) that captures one of the highest-volume Legionella searches.
Basics & science · 6 min read
- 03Landlord responsibilities for Legionella in rental properties
Most UK rental homes are low risk; the real job is a proportionate risk assessment and a flush between tenancies, not a 'certificate' someone sold you.
Law & compliance · 8 min read
Landlord or letting agent
A rental property or two, and you need to know what the law actually expects.
- 01Landlord responsibilities for Legionella in rental properties
Most UK rental homes are low risk; the real job is a proportionate risk assessment and a flush between tenancies, not a 'certificate' someone sold you.
Law & compliance · 8 min read
- 02Do you need a Legionella certificate? What the law actually requires
Clarifies that the legal duty is a risk assessment, not a certificate, and what evidence actually counts.
Law & compliance · 6 min read
- 03Managing agent or landlord: who actually holds the Legionella duty?
Resolves the agent-versus-owner duty confusion that causes real-world compliance gaps.
Law & compliance · 8 min read
Newly responsible for a building
Just handed the duty for a workplace or communal building? Start with the fundamentals.
- 01What is Legionella? An introduction to the bacteria and disease
Legionella only becomes your problem when warm water sits still and then gets breathed in, understand those two conditions and the whole subject gets simpler.
Basics & science · 5 min read
- 02UK Legionella compliance 101: laws and responsibilities
There is no single Legionella law; the duties come from general health and safety law and land on whoever controls the building, so the real question is who is accountable and what proves control.
Law & compliance · 6 min read
- 03Legionella risk assessment basics: what it is and why you need it
A Legionella risk assessment is a decision document, not a certificate; its job is to rank what could grow, who is exposed, and what to fix first.
Risk assessment · 7 min read
- 04Temperature control basics for Legionella prevention
Look past single readings and judge whether the whole water system can hold control.
Temperature control · 7 min read
- 05Routine monitoring and flushing: the basics
Flushing and monitoring are the two day-to-day halves of Legionella control; do them as a managed routine, not a tick-box, and you cover most of the everyday risk.
Monitoring & sampling · 7 min read
- 06Legionella logbooks: an introduction to record keeping
A logbook's only job is to turn the work you did into proof you can hand to an auditor, an inspector, or whoever inherits the building, and the proof lives in the exceptions, not the green ticks.
Record keeping · 6 min read
Appointed Responsible Person
Running the day-to-day scheme of control and the records behind it.
- 01Duty Holder and Responsible Person roles in Legionella management
Duty holder and responsible person are two different jobs, and neither can be contracted away; the comparison that matters is what each role owns and what stays with you even when someone else does the work.
Law & compliance · 6 min read
- 02Written scheme of control template and worked example (COSHH & ACoP L8)
Provides the legally-driven document as a downloadable template with a worked example, and shows how L8log keeps the scheme live rather than a static one-off file.
Law & compliance · 7 min read
- 03Routine monitoring and flushing: the basics
Flushing and monitoring are the two day-to-day halves of Legionella control; do them as a managed routine, not a tick-box, and you cover most of the everyday risk.
Monitoring & sampling · 7 min read
- 04Acting on your risk assessment: setting priorities
An assessor's High/Medium/Low rating tells you what's worst if ignored, not what to do first; re-rank the findings by exposure, permanence and drift before you spend.
Risk assessment · 7 min read
- 05Reviewing and updating your Legionella risk assessment regularly
Use risk assessment review as a fault-finding exercise, not just a compliance label.
Risk assessment · 7 min read
Healthcare / authorising engineer
NHS estates, water safety groups and the HTM 04-01 world, with vulnerable patients.
- 01Legionella in healthcare: HTM 04-01 and NHS guidance
Treat vulnerable users as the design constraint, not as an afterthought.
Law & compliance · 8 min read
- 02Legionella prevention in hospitals and healthcare facilities
In a hospital the question isn't whether to control Legionella but which method belongs where, choose by the patient risk you carry and the evidence each method leaves, not by what's cheapest to add.
Building types · 9 min read
- 03Developing a comprehensive Water Safety Plan
A Water Safety Plan only earns the name when it becomes a governed control loop, limits with escalation, a group that owns them, verification that feeds back, rather than a risk assessment with a new cover.
Best practice · 8 min read
- 04BS 8680 water safety plans: turning controls into a management system
You already run the controls; BS 8680 is the management layer, ownership, limits, escalation, verification, review, that makes them survive an audit and a staff change.
Best practice · 8 min read
"Start here: choose your Legionella path." Legionella.io. https://legionella.io/start-here/
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