Legionella
Conducting a Legionella Risk Assessment (LRA) is a legal requirement under the Health and Safety at Work Act 1974. Building managers must ensure the safety of individuals within their premises. Hiring a qualified water hygiene specialist, such as S.E.I Tech, ensures compliance with legal requirements and reduces the risk of Legionnaires' disease.
Where Can Legionella Bacteria Thrive?Legionella bacteria occur naturally in water sources like lakes and reservoirs but thrive in man-made water systems such as:
· Water stagnation.
· Fluctuations or maintenance of water temperatures within the ideal range for growth.
· Changes in municipal water quality.
· Accumulation of scale and sediment.
· Variations in pH levels.
· Insufficient levels of disinfectant.
· Disruptions caused by construction activities.
Legionella bacteria naturally occur in water sources such as lakes, reservoirs, rivers, and streams. However, they can also grow in artificial water systems, including hot and cold water systems, cooling towers, and spas. Under suitable environmental conditions, both natural and man-made water systems can support Legionella growth.
The health risks posed by Legionella bacteria increase significantly in systems where water is stored or recirculated, particularly if water droplets are dispersed into the air as aerosols. S.E.I Tech specializes in identifying and mitigating these risks through comprehensive assessments and customized solutions.
Conditions that Encourage Legionella Growth:
What is Legionnaires' Disease?Legionnaires' disease is a severe type of pneumonia caused by Legionella bacteria. S.E.I Tech provides expert advice on managing water hygiene to mitigate this risk.
When Should You Conduct an LRA?Regular LRAs are essential to ensure safety. The Approved Code of Practice L8 (ACoP L8) recommends conducting an LRA when:
What Does an LRA Involve?
Building managers, landlords, and employers must be aware of the health risks associated with Legionella bacteria and conduct regular risk assessments. The Approved Code of Practice L8 (ACoP L8) recommends reviewing the LRA whenever circumstances suggest it may no longer be valid, rather than adhering to a rigid two-year schedule.
An LRA should also be performed more frequently if occupants include high-risk individuals, such as the elderly or immunocompromised. Situations that necessitate an updated LRA include:
· Changes in the building’s usage or water system.
· Personnel changes affecting water management.
· Transition from unoccupied to occupied status.
· Updates in relevant legislation.
· A reported case of Legionnaires' disease.
S.E.I Tech assists clients in scheduling and conducting timely LRAs to ensure continuous compliance and occupant safety.
What Does a Legionella Risk Assessment Involve? An LRA is a two-part process involving both a document review and a physical inspection.
· Document Review: Evaluates previous assessments, maintenance records, and ensures remedial actions have been implemented.
· Site Inspection: Focuses on areas where water is stored or aerosols may form, such as tanks, pipes, and outlets.
A detailed report includes recommendations and a prioritization system (Red, Amber, Green) to address risks.
Legal RequirementsEmployers, landlords, and building managers must assess and manage Legionella risks. Partnering with S.E.I Tech ensures compliance and occupant safety.
