What the Law Says About Legionella Risk Assessments
Legionella bacteria can cause Legionnaires’ disease — a serious and sometimes fatal form of pneumonia.
UK law requires all dutyholders to control the risk in premises where water systems are present.
This includes residential, commercial, and public buildings.
Legal Duties at a Glance
The main legal framework includes:
- Health and Safety at Work etc. Act 1974 – General duty to ensure health and safety
- COSHH Regulations 2002 – Legionella is a hazardous substance under COSHH
- ACOP L8 – HSE’s Approved Code of Practice for Legionella control
- HSG274 – Practical guidance on managing different types of water systems
Who Must Comply?
The law applies to anyone who controls premises:
- Landlords (including domestic lets)
- Employers and workplace managers
- Schools, care homes, dental practices, leisure centres
- Property managers and letting agents
Meeting your legal duties involves assigning a competent responsible person and ensuring a full risk assessment is carried out.
Our guides explain exactly how to stay compliant and avoid enforcement action.
When Is an Assessment Required?
A Legionella risk assessment must be completed:
- Before premises are occupied
- When water systems change or are modified
- When control measures fail or conditions change
- Every 2 years as part of routine review
What Happens If You Don’t Comply?
Failure to carry out a suitable and sufficient risk assessment can lead to:
- HSE enforcement notices
- Large fines or prosecution
- Increased liability if someone becomes ill
Stay on the right side of the law — book a compliant risk assessment today. Get in touch here.
