A Legionella Risk Assessment is a detailed evaluation of a property’s water systems to identify and control the risk of Legionella bacteria, which can cause Legionnaires’ disease. The assessment reviews water storage, pipework, outlets, and usage patterns to determine where conditions may allow bacteria to grow and spread.

For rental properties in England, landlords have a legal duty under the Health and Safety at Work etc. Act 1974and the Control of Substances Hazardous to Health (COSHH) Regulations 2002 to assess and manage the risk of Legionella within their properties.

The assessment considers factors such as water temperature, stagnation, system design, and maintenance practices, providing clear guidance on any actions required to reduce risk. While there is no fixed legal interval for reassessment, it must be reviewed regularly and whenever there are changes to the water system or property usage. In most cases, an annual review is considered best practice.

A suitable and sufficient Legionella Risk Assessment is essential for demonstrating compliance and ensuring that water systems are being managed safely.