legionella online course

Legionellosis is the collective name given to the pneumonia-like illness caused by legionella bacteria. This includes the potentially fatal legionnaires’ disease, as well as the similar but less serious conditions.

Any water system that has the right environmental conditions can become a source of legionella bacteria. Cooling towers, evaporative condensers and whirlpool spas are particularly susceptible but all water systems can pose a risk.

This online course is aimed at legionella duty holders, nominated legionella responsible persons and those with operational responsibility for the management of the services of a building. It meets the training and awareness requirements of relevant legislation and regulations including L8, HSG 274, HTM 04-01, COSHH and the Health and Safety at Work Act 1974.

For a more general legionella awareness training course click here.

  • Full voiceover.
  • Instant access to PDF certificate on completion.
  • High quality printed certificate upgrade only £5.00 +VAT.
  • RoSPA approved certificate and 2 CPD credits.
  • Takes an average of 2 hours to complete.
  • No hidden costs – includes 12-months access and unlimited assessment resits.
  • Meets the requirements of HSE, CHAS, SafeContractor, ConstructionLine, Exor, SMAS and other SSIPs.

Legionella Training Course – Advanced. Online with instant downloadable certificate.

Legionella Advanced Training Course – Accreditation and certification

RoSPA Assured/CPD Certificate

Successful candidates will receive a RoSPA Assured/CPD Certificate and 2 CPD Credits.

This course certificate has no expiry date because there is no formally recognised period of validity for any health and safety training or this type of course. The HSE recommends refresher training is carried out whenever it is felt necessary. Safety registration bodies such as CHAS, SafeContractor, ConstructionLine & SMAS and other members of the SSiP scheme recommend most re-training is done every 3 years. We would recommend refreshing knowledge as and when legislation or guidance changes applicable to these regulations.

All of our courses, systems and services have been registered to the internationally recognised ISO 9001:2015 quality standard. Quality Management Systems Ltd (QMS) made this prestigious award to Commodious in January 2018. This gives assurance that the training and assessment was completed with a quality registered organisation.

Advanced online legionella course

Legionella Advanced Awareness Training – Objectives

This online legionella awareness course will help organisations and in particular legionella duty holders, legionella responsible persons, and building service managers meet their legal obligations under L8, HSG 274, HTM 04-01, COSHH and the Health and Safety at Work Act 1974. It will also provide candidates with a thorough awareness of the dangers associated with legionella and the management and control measure required to control the risks. 

After completing the course, candidates will:

  • Be aware of the dangers of legionella bacteria;
  • Have knowledge of the conditions that promote the growth of legionella;
  • Have knowledge of the methods that transmit legionella bacteria;
  • Have knowledge of the legal and regulatory framework that underpins legionella management;
  • Be aware of the most common high risk water systems that encourage legionella growth and dissemination;
  • Be aware of the methods required to assess the risk from legionella;
  • Be aware of the management and control requirements to ensure that risks are controlled effectively;
  • Understand how to carry out a legionella risk assessment.

Advanced Legionella Training – Course Structure

The course comprises 5 interactive modules and a final assessment. Links to recommended reading and additional resources may be provided within the training modules. These links are not mandatory and will not be tested for in the final assessment.


It takes approximately 2 hours to complete the course in full. This can be spread out over multiple sessions or completed in a single session. There is no time limit for completion.


All candidates must complete a multiple choice assessment after working through the training material. The candidate will be asked 20 multiple choice questions, randomly chosen from a larger question pool, and need to answer a minimum of 15 correctly to pass. Candidates will be given instant feedback after completing the assessment stating whether they have passed or failed. The assessment can be re-taken as many times as is required to pass at no additional cost.

Legionella Awareness for Duty Holders Training – System requirements

Our courses are compatible with the latest versions of all modern desktop web browsers, including Google Chrome, Mozilla Firefox, Microsoft Edge and Safari. On mobile devices, they are compatible with the latest version of Safari or Google Chrome running on iOS 12/Android 6.0 or later.

You can check your current web browser, and whether it is the latest version, by visiting whatismybrowser.com.

For the best experience, we recommend using Google Chrome version 90 or later. We do not recommend using Internet Explorer to access our courses as this can cause compatibility issues and lead to a poor experience.

Bulk Purchases

After a successful purchase you will be automatically taken to our registration process. Here you create your learner(s) and assign the course(s) to them so that they can start training immediately. If you do not know all the learner details – no problem, you can return later and create the learners when it suits you.

The system automatically creates an admin group of your learners, this means you can access your learner accounts to obtain certificates or schedule reports on the progress of your group, useful for Health & Safety audits or Registration to organisations such as CHAS, SMAS, SafeContractor, ConstructionLine etc or site access when certificates are required.

If this all sounds too complicated feel free to contact us, we are more than happy to enrol you or your colleagues on your behalf.

Legionella Awareness Duty Holders Training

Free Trial

We know how difficult it can be choosing online training, we have been there ourselves! That is why we are giving free access to all our health and safety training courses (excluding exams) so you can try them out and satisfy yourself with the quality.

We know that when something looks too good to be true, there’s often a catch. There are no catches, we simply want to give you a more informed choice. Email us with your requirements and we will set you up.


Legionella Awareness Duty Holders Training

Additional information on Legionnaires disease and Legionella

How are coronavirus and legionella linked?

HTM 04-01 training and temperature monitoring

Landlords and responsibilities regarding Legionella and Legionnaires Disease.

Who is this Legionella Awareness training course suitable for?

This course is suitable for anyone in charge or in control of premises, no matter the size or capacity. This includes:

  • Building owners
  • Managers
  • Supervisors
  • Maintenance workers
  • Landlords
  • Letting agents

Course programme

The Legionella awareness course covers the following topics:

  • What is Legionella?
  • Signs and symptoms
  • Legislation and legal responsibilities
  • Control processes, prevention, and risk management

Learning outcomes

Learning outcomes of the Legionella awareness course:

  • Understand what Legionnaire’s Disease is, where it comes from, and how it affects people’s health.
  • Understand where Legionella can commonly be found and how to risk assess these environments.
  • Be aware of water hygiene safety measures to reduce the risk of a Legionella outbreak.

Next steps

Other Phoenix courses that may be suitable for successful candidates include:


There is a multiple-choice assessment at the end of the course, with results provided immediately.

Please note: You have 12 months to complete the course from day of purchase.

Multiple course discounts

The cost of any of our short, online courses is £24.95 per candidate, per course.

Employers who book groups of employees for Phoenix health and safety training can make significant savings:

  • Buy 25+ for £19.95 per candidate 
  • Buy 50+ for £17.95 per candidate
  • Buy 100+ for £15.95 per candidate

Why provide Legionella Assessments?

Legionella is a potentially deadly bacteria commonly found in man-made hot and cold water systems. Systems that are left unused for some time can become stagnant which can create the perfect environment for legionella bacteria to grow. Coronavirus has led to many rental properties lying empty – and creating a headache for landlords. That’s where you come in.

Required by HSE

Those in control of premises, such as landlords and property agents, are required by government and the Health and Safety Executive (HSE) to ensure the health and safety of their tenants, which would include identifying and controlling the risks associated with legionella.Quick to complete

The assessment can be completed in as little as 30 minutes and is ideal for owners of private rental property as well as energy and trade professionals who regularly work within residential and commercial properties.

Why choose Elmhurst for Legionella Training?

Leave feeling confident

Elmhurst’s Legionella course has been developed to provide information at a pace that suits all of our trainees, regardless of whether they are new to the industry or are more experienced. We ensure that everyone understands the content and are able to gradually build up their skills and knowledge.Unrivalled support

Our role as one of the UK’s approved accreditation schemes means that we are able to provide continued support to those who join our accreditation scheme, long after the training. This is something which independent training providers are unable to provide.Training delivered since 1993

Elmhurst has been operating for over 25 years, and during this time our experienced and qualified trainers have undertaken training for thousands of individuals. As the UK’s largest accreditation scheme for Energy Assessors, we have the expertise and the knowledge to help you thrive and grow within this exciting career.

Elmhurst Legionella Training Delegate

Legionella Accreditation with Elmhurst

Once trained as a Legionella Risk Inspector, you will be eligible to join Elmhurst’s industry leading accreditation scheme, free of charge. If you are looking for a scheme which offers professional technical support and opportunities to enhance your skills, as well as the tools to build a competitive business, then Elmhurst Energy is the accreditation scheme for you.

  • Access to cutting edge mobile and desktop software for data collection and reporting
  • Unrivalled technical support
  • Free pay-per-click member insurance to cover your legionella risk assessments
  • Marketing material available to help sell your services
  • Discounted and free CPD available for members

This Legionella and Legionnaires’ Disease Awareness Training course will help duty holders understand their legal responsibilities in relation to controlling legionella risks in man-made water systems, including evaporative cooling systems, hot and cold water systems, and other risk systems like spa pools. It explains the laws and regulations that apply to legionella, including the guidance contained in ACOP L8, the common risks posed by man-made water systems, how to carry out a risk assessment of legionella, and what control measures they may need to implement.

On completion of the course, you will understand what you need to do to minimise the risks of legionella bacteria in your water systems, so those who may be exposed to legionella risks are protected from harm.

  • Helps learners understand how to comply with certain UK legislation in relation to legionella, such as the Health and Safety at Work etc. Act and the Control of Substances Hazardous to Health (COSHH) Regulations.
  • Written in accordance with the guidance contained in the Approved Code of Practice L8: the control of legionella bacteria in water systems
  • Includes a downloadable risk assessment template
  • Developed by health and safety professionals
  • Approved by CPD and IIRSM. Assured by RoSPA
  • Fully online course and assessment with no time limits
  • Full audio voiceover
  • Approximate duration: 2-3 hours
  • On completion, certificate is posted the next working day

Who should take this course?

This course is suitable for anyone in charge of premises (known as the duty holder) with water systems that could pose legionella risks, no matter how big or small the premises are, and regardless of the number of people present. This includes all employers, self-employed people, and anyone else in control of a premises, such as landlords and letting agents. It will explain what their legal duties are in relation to the water systems in their premises, how to carry out a risk assessment for legionella, and what control measures they may need to implement.

Examples of man-made water systems that duty holders may have in their premises include:

  • Evaporative cooling systems.
  • Dry and wet coolers or condensers.
  • Hot and cold water systems, such as for taps and showers.
  • Spa pools.
  • Misting devices for food production.
  • Emergency showers and face wash fountains.
  • Sprinkler and hose reels.
  • Vehicle washes including automatic washers.
  • Wet scrubbers and gas scrubbers.
  • Fountains and decorative water features.

The Health and Safety Executive’s ACOP L8 provides an in-depth guide to how duty holders can comply with their legal duties. This training course is based on ACOP L8 and will cover each of the duties in more detail throughout the modules. It has also been written with consideration of the three HSG 274 documents that provide further guidance for specific man-made water systems, as well as the guidance document for spa pools. It is also suitable for landlords, who have an obligation to be aware of the dangers posed by legionella bacteria and to carry out a risk assessment, so they can keep their tenants safe from harm.

Taking this course will therefore help duty holders understand what to do to follow the guidance set out in ACOP L8 and where to find further advice for their specific water systems.

COVID-19 and Legionella

This course is suitable for duty holders looking to carry out a legionella risk assessment after their business has experienced a period of closure due to COVID-19. It explains the HSE guidance set out specifically for COVID-19 risks that arise due to closures. Water systems in buildings that are unoccupied for prolonged periods of time may be at risk of water stagnating in the system and legionella bacteria growing, so it is important for you to consider this risk if your workplace closes for any period of time due to COVID-19.


CPD Approved
RoSPA Approved
IIRSM Approved

All of our courses are accredited by the CPD Certification Service as conforming to universally accepted Continuing Professional Development (CPD) guidelines.
This course is also assured by the Royal Society for the Prevention of Accidents through their RoSPA Qualifications Assurance System, as providing up-to-date, quality and content-approved training.

Additionally, this course has been independently recognised by the International Institute of Risk and Safety Management as meeting the standards of its Training Approval Scheme.

On successful completion of the course you will be sent a quality assured certificate through the post the next working day. This can be used to provide evidence for compliance and audit. 

This certificate does not have an expiry date. However, based on industry best practice guidelines, the recommended renewal period for this training is 2 years. We will print this recommended renewal date on your certificate.

Screenshots (click to view)

Course screenshot showing the written scheme for controlling legionella risks
Course screenshot showing the first step to identifying hazards
Course screenshot showing which water systems are at risk of legionella
Sample Legionella and Legionnaires' Disease Awareness Certificate

If you wish to try this course then register for a demo by clicking the ‘interactive demo’ button. You will be given the option to purchase and continue with your course at the end of your demo!
Interactive Demo

Course content

1Introduction to Legionella and Legionnaires’ DiseaseWhat is legionella and where does it come from, which water systems are at risk of legionella, how do people contract Legionnaires’ disease, symptoms of Legionnaires’ disease, who is most at risk of legionella and Legionnaires’ disease, how is Legionnaires’ disease diagnosed and treated, case study, and legionella responsibilities during COVID-19.
2Legal Responsibilities of Duty HoldersThe Health and Safety at Work etc. Act, responsibilities of duty holders under the HSW Act, the Management of Health and Safety at Work Regulations, duties of designers, manufacturers, importers, suppliers, and installers under the HSW Act, employee responsibilities under the HSW Act and MHSWR, the Control of Substances Hazardous to Health (COSHH) Regulations, the Approved Code of Practice L8, the Notification of Cooling Towers and Evaporative Condensers Regulations, and the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations.
3Legionella Risks in Man-Made Water SystemsEvaporative cooling systems, hot and cold water systems, other risk systems, spa pools, and assessing the risks.
4Risk Assessment for LegionellaWho has duties to carry out risk assessments, risk assessment requirements, what is a risk assessment, important phrases and terminology, competent person, step 1: identify the hazards, step 2: determine who might be harmed and how, step 3: evaluate the risks and implement controls, step 4: record your findings, and step 5: monitor, review, and update the assessment.
5Controlling Legionella RisksThe role of the competent person, maintaining staffing levels and knowledge, design and commissioning of water systems, key precautions, written scheme for controlling legionella risks, operation of water systems, monitoring and inspection, cleaning and disinfecting water systems, record keeping, controlling water systems in domestic properties, and training, instruction, and communication.

 Download Course Overview (PDF)

Aims of the course

By the end of this course, you will understand:

  • Where legionella bacteria come from, how people develop Legionnaires’ disease and how it affects a person’s health.
  • How legionella bacteria can multiply in man-made water systems.
  • The legal responsibilities of duty holders regarding the prevention and monitoring of legionella risks.
  • How duty holders should carry out a risk assessment to identify and evaluate how to control legionella hazards.
  • The main control measures that are advised to reduce the risks of legionella.
  • The importance of continually monitoring, maintaining, and updating legionella control measures.


The online assessment is taken on completion of the training material. You will be asked 20 multiple choice questions with a pass mark of 80%. The answers are marked automatically so you will instantly know whether you have passed. If you don’t pass don’t worry! You can take the test as many times as you need with no extra charge.

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