What is a Legionella risk assessment?

A Legionella risk assessment is a systematic review of your water systems to identify conditions that could allow Legionella bacteria to grow and spread. It looks at system design, water temperatures, usage, and existing control measures, and sets out clear actions to reduce risk and maintain legal compliance.

Is a Legionella risk assessment a legal requirement?

Yes. Under health and safety law, dutyholders must assess and manage the risk of Legionella in water systems. A suitable and sufficient risk assessment is the foundation of legal compliance and demonstrates that appropriate controls are in place.

Who is responsible for Legionella compliance?

Responsibility sits with the dutyholder. This may be a building owner, employer, landlord, managing agent, or person in control of the premises. We help clearly identify roles and responsibilities as part of the assessment.

How often should a Legionella risk assessment be reviewed?

A risk assessment should be reviewed regularly and whenever there is a significant change to the water system or building use. In most cases, this is at least every two years, though higher-risk systems may require more frequent review.

What types of buildings do you assess?

We carry out Legionella risk assessments for:

• Offices and commercial premises
• Hotels and hospitality sites
• Healthcare and care environments
• Schools and educational buildings
• Residential blocks and communal systems

Each assessment is tailored to the specific risks of the building.

What happens during the assessment?

We carry out a site inspection of hot and cold water systems, review system design and usage, take representative temperature checks, and assess existing control measures. We also discuss site history, known issues, and current management arrangements.

Will water sampling be carried out?

Routine sampling is not always required and is not a substitute for a risk assessment. Where sampling is appropriate, we will advise clearly and proportionately based on the site risk profile.

What documents will I receive after the assessment?

You’ll receive a written Legionella risk assessment report that includes:

• Identified risks
• A clear risk rating
• Practical, prioritised recommendations
• Site schematics and asset information where applicable

We can also support with Written Schemes of Control and compliance documentation if required.

Do you provide ongoing support after the assessment?

Yes. We can support ongoing water safety through advice, documentation, monitoring guidance, and compliance tools to help you manage your systems confidently year-round.

How often should a Legionella risk assessment be reviewed?

A risk assessment should be reviewed regularly and whenever there is a significant change to the water system or building use. In most cases, this is at least every two years, though higher-risk systems may require more frequent review.

How long does a Legionella risk assessment take?

Most site assessments are completed within a few hours, depending on the size and complexity of the building. Reports are typically issued shortly after the visit.

How do I book a Legionella risk assessment?

You can request an assessment using our contact form. We’ll gather a few key details and provide clear next steps, including timescales and costs.