Legionella Risk Assessment

Fully Compliant Risk Assessments for Legionella in the UK

Compliant Legionella Risk Assessment

All you need to know about Legionella Risk Assessments:

At its core, a legionella risk assessment is a process that helps identify potential sources of Legionnaires’ disease, a type of pneumonia caused by the Legionella bacteria.

Here are some key points to keep in mind when it comes to booking a risk assessment for legionella:

  1. What is a legionella risk assessment?
    The process of identifying and assessing the risk of exposure to Legionella bacteria in a particular environment. This could be in a building, such as an office or hospital, or in a particular system, such as a cooling tower or hot water system.
  2. Why is it important?
    Legionnaires’ disease can be a serious illness that can cause severe respiratory symptoms and even death in some cases. By identifying and assessing the risk of Legionella exposure, you can take steps to prevent outbreaks and keep people safe.
  3. What does a risk assessment involve?
    A risk assessment for legionella typically involves a thorough inspection of the environment or system in question, as well as testing for the presence of Legionella bacteria. Based on the findings, a risk assessment report will be produced, which outlines any potential risks and recommended actions to mitigate those risks.
  4. Who can conduct an assessment?
    Legionella risk assessments should only be conducted by trained and qualified professionals who have the necessary expertise and equipment to carry out the assessment safely and accurately.
  5. What are some of the key factors that can increase the risk of Legionella exposure?
    Some of the key factors that can increase the risk of Legionella exposure include stagnant water, poor water quality, and inadequate maintenance of water systems.

By conducting a thorough assessment, you can help protect the health and safety of everyone in your building or system. So if you’re concerned about Legionella exposure, don’t hesitate to contact us today.

Get Your Free Risk Assessment Quote Today:

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Why Choose Acquiesce Environmental Compliance Ltd?

With over 7 years of happy customers and over 50 years of experience in the control of legionella across our team. We pride ourselves on being communicative, professional & reliable. We’re always just a phone call away and no question is ever too small.


Years Experience

Reliable Legionella Risk Assessment


Efficient Legionella Risk Assessment


Fully Compliant Legionella Risk Assessment


Experienced & Compliant Water Hygiene Services

At Acquiesce Environmental Compliance Ltd, we have over 50 years combined experience providing fully compliant legionella control & water hygiene / treatment services for companies large and small throughout the UK. Our friendly staff are always on call to help you with any enquiry you may have.

Unlike other legionella risk assessment companies, Acquiesce Environmental Compliance Ltd can also provide you with monitoring programmes, training, remedial works and cleaning & disinfection services as well as ongoing support and self delivery packages. This will allow you to monitor your water system and to stay compliant with Acop L8 legislation and HSG274 guidance.

Acquiesce Environmental Compliance Ltd has a team of experienced, City & Guilds qualified legionella risk assessors. We are highly experienced in assessing the risk for Legionella, including full colour CAD drawn schematic diagrams, in line with the requirements of Acop L8, HSG274, BS8580-1 2019 & HTM04-01 for Healthcare buildings.

Experienced in delivering assessments in all types of buildings & sectors including:

Leisure & Retail, Social/Sheltered Housing, Care Homes, Healthcare, Manufacturing, Offices Hospitality,  Educational, Residential.

Acquiesce Legionella Risk Assessment

Compliant Water Treatment Services:

At Acquiesce Environmental Compliance, we strive to be the best. That’s why we are constantly working to provide you with a fully compliant service read more about our accreditations and certifications here:

Acquiesce Compliant Legionella Risk Assessment


1 Agree The Scope of Assessment

After you enquire we’ll be in touch to discuss your full requirements and agree the scope of the assessment. This will much depend on the size and system installed within your site(s). Some buildings have many types of cold water storage tank, water heaters, calorifiers etc. Buildings can also have water features which must be assessed and controlled. Industrial premises often have process water systems which are complex but provide real risk in terms of bacterial growth and amplification.

Agree the Scope of Legionella Risk Assessment

2 Assessor Visit

A qualified and experienced assessor will visit you at your premises to carry out a detailed inspection of your water system including water sampling if requested / agreed.

Any legionella logbooks, training qualifications / records, monitoring, inspection and cleaning records will need to be inspected if present.

The assessor will then inspect the water system. This includes assessing each system individually:

  • mains cold water
  • cold water tanks
  • calorifiers
  • water heaters
  • water features

Temperatures will be taken from taps, showers and other outlets, photographic evidence taken of risk & general observations. Our assessor will need to check as much pipework as possible. Risers, roof spaces and cupboards may also be checked.

Legionella Risk Assessment on site testing

3 Onsite Inspection & Testing

The assessor will need to meet with the building manager or responsible person to inspect any previous legionella assessments you may have and your legionella monitoring log book to confirm control measures currently used to control the risk.

They will also need to check the competency of staff which will involve inspecting training records they have. Our assessor will also need to find out about the types of people using the building such as general ages of staff and building users in order to identify if susceptible people are present. This also provides a risk rating for the report which will confirm the risk of exposure.

Once this is complete, then the assessor will need to inspect all of the water system(s) in full. This will involve inspection and testing the mains cold water supplies, cold water tanks, water heaters, water features, heating systems and all pipework feeding your taps, baths, sinks, showers and outlets. Temperatures will need to be tested from as many outlets as possible. Photographs will be taken of general observations and anything else considered to be a risk.

We commonly identify risks such as:

  • Dirt and debris In the system (sediment in cold water tanks, scaled taps/showers) infrequently used outlets
  • Temperatures out of range (temperatures between 20-45c favour growth of legionella bacteria) and anything which can contribute to the growth of legionella bacteria, including how water droplets can form aerosol.

Our assessor will need access to as many areas of the building and system as possible, which will help with the schematic diagram we will produce for your system(s) as part of the report.

4 Legionella Sampling/ Reporting

If samples are taken, these will be dropped off directly at our UKAS accredited laboratory and the Assessor will return to our office where they will compile a full report.

Any sample results are delivered digitally to you swiftly upon being received from the laboratory (10 days for legionella samples) however we can receive interim resorts of any samples that appear to be positive before the final result is issued. This ensures you have early warning of potential problems within your water system.

When the report is complete, we will then electronically send you the report and can also post out a hard copy of the assessment in a presentation folder.

We then can provide detailed guidance and assistance after the assessment to ensure the document is fully understood and you are on the path to being compliant. We can also assist with any remedial actions recommended within the assessment, as well as training and equipment.

Legionella Risk Assessment Sampling

Get in touch today to book your assessment

Legionella Risk Assessments Frequently Asked Questions

Legionella is a harmful bacteria which causes legionnaires’ disease. Legionella grows in many common environments such as man made water systems. If your business has a hot and cold water system, it is your legal duty to keep your water systems properly maintained to prevent an outbreak of Legionnaires Disease.

Legionnaires’ disease is a form of pneumonia. Symptoms of Legionnaires’ disease include:

Coughing, fever, shortness of breath, vomiting & diarrhoea, headaches, muscular pain.

The fatality rate is approximately 25% for people with underlying medical conditions and around 10% for those with good health.

A Legionella Risk Assessment is a test of water systems and management protocols to identify risks which could lead to legionella bacteria growth.

If you are the owner of business premises or rented accommodation with a hot and cold water system, it is a legal obligation to conduct a legionella risk assessment in accordance with the Health and Safety at Work Act 1974 and the relevant legislation, such as the Acop L8 (4th edition) and the HSG274 guidance document.

This assessment is necessary to determine the likelihood and level of risk of exposure to legionella and other waterborne bacteria for your staff, visitors, or building users. Failure to comply with this legal requirement can result in serious consequences, including legal action and harm to human health.

An assessor will visit your premises to inspect your water system and management protocols. The assessor will inspect all accessible areas of the system. We will take samples at this stage if agreed in the initial scope.

If we discover legionella in your water system, our trained experienced consultants will give you prompt advice on what to do next.

The onsite element of a test takes from one hour to one week to complete. This depends on the size of the building(s), sites and systems installed. A Legionella Risk Assessment takes around 1 – 2 weeks from start to completion.

To provide an accurate quotation we need to know the size of the building(s), water systems and details about the building usage. For a free quotation, get in touch today!

You should review your legionella risk assessments on average every 2 years. Also if conditions change such as changes in building usage/ water system or availability of new guidance.

Give us a call today on 0330 094 5466 or email info@acquiescecompliance.com. One of our experienced, friendly staff will gather the information for the scope of the assessment and book you a time to suit your needs.

Alternatively, fill in our contact form here and we will get back to you as soon as we can.

What is Legionella

What do our clients say?

I recently noticed a strange smell coming from the water in my bathroom sink. When I investigated further, to my horror I discovered a dead animal in my cold water tank. I called Acquiesce who provided a reasonable quote to do the job. The engineer they sent (Mark) did an extremely thorough job and was helpful, friendly and informative throughout, giving me great confidence that the job would be done to the highest of standards. I hope never to have such an issue again, but if I did, I wouldn't hesitate to contact Acquiesce. They were excellent to deal with.
Anand Verma
Anand Verma
Speedy, detailed and the best valued company that I could find. Clear and rapid communication. Arrived when they said they would. I can recommend Acquiesce.
CW Taylor
CW Taylor
Great company to deal with - was recommended by a friend and they were everything he said they would be - communicative, punctual, courteous and wrote a 5* water risk assessment for our wedding venue as well as told us the practical solutions to our issues. Always available to answer technical queries on the phone - even from a layman! We will be using them again - 5 stars.
James Bayliss
James Bayliss
Acquiesce carried out a legionella risk assessment for us at short notice. The quality of the report was excellent and they turned this around quickly for us. They then completed the remedial works required to ensure we were compliant/ Great service and very reasonable costs.
Rob Weeks
Rob Weeks
Excellent service as always from Acquiesce. Have used them regularly on our sites. Risk assessments are always accurate, staff are always polite and punctual. I haven't been shy in recommending them to others when they need their work done.
ian thorn
ian thorn
Completed a legionella risk assessment for us at short notice, then rectified the issues they found within 24 hours. Cannot recommend enough. Took some water samples for us when our water was discoloured. Found the problem straight away and sorted this out for us. Price much cheaper than we had expected. Staff friendly and made us feel at ease in our building. Always on the end of phone for advice
Louise Dooley
Louise Dooley
Professional company! So happy with the service and the price. Would use them again.
Paul Hardy
Paul Hardy
Excellent service. An assessor was sent to our site and made us feel very at ease with our water supply. The report they delivered was excellent and very easy to understand
5 star rating Legionella Assessment

“I would just like to say how happy we are with the service we get – they Monitor our water system on a monthly basis they do the risk assessment when needed, always punctual polite and if ever I need them they are at the end of the phone. Nothing is too much of a problem to sort out for us”

St James’ Catholic Primary School

5 star rating Legionella Assessment

“Callum and the rest of the team have been a great company to deal with – not always the case with health and safety matters! They were communicative, punctual & courteous.We will be using them again – 5 stars”

Charlie Taylor
Hadsham Wedding Venue

5 star rating Legionella Assessment

“We have been using Acquiesce Environmental Compliance to carry out our Legionella Risk Assessments, install Carbon Monoxide Alarms and Smoke Alarms to our rental properties. They have been brilliant, contacting the tenants and liaising with them to carry out the appointments (often at unsociable hours).”

Sara Roche
Manager – Rowley Roche & Associates