Question 1

What is Legionella?

Accepted Answer

Legionella is a hazardous bacterium found in natural water sources such as rivers and lakes, as well as in manmade water systems where it can become harmful to human health. The bacteria thrive in three conditions: temperatures between 20°C and 45°C, the presence of nutrients such as scale, rust, sludge and biofilms, and stagnation caused by infrequently used outlets or redundant pipework. Temperatures above 60°C kill the bacteria within two minutes.

Question 2

What is Legionnaires' disease?

Accepted Answer

Legionnaires' disease is a serious form of pneumonia caused by inhaling water droplets contaminated with Legionella bacteria. Contamination most commonly occurs through cooling towers, showers, spa pools or hosepipes. Early symptoms resemble flu and the condition is often misdiagnosed. Those most at risk include people over 45, heavy smokers and drinkers, and individuals with lung, heart, kidney disease, or weakened immune systems. Legionnaires' disease can be fatal in around 12% of cases, making prompt antibiotic treatment essential.

Question 3

What is a Legionella risk assessment?

Accepted Answer

A Legionella risk assessment identifies potential hazards within a property's water system that could support Legionella growth. It determines what control measures and management systems are needed to reduce risk and ensure compliance with UK health and safety regulations, including ACOP L8 guidance.

Question 4

Is a Legionella risk assessment a legal requirement?

Accepted Answer

Yes. Under UK health and safety law, landlords, business owners, employers and property managers are legally required to assess and manage the risk of Legionella within their properties. This forms part of their duty of care to ensure the safety of employees, tenants and the public. Failure to comply can result in enforcement action, fines, and serious health risks.

Question 5

What does a Legionella risk assessment include?

Accepted Answer

A Legionella risk assessment is the first step to ensuring a property is compliant and protected from Legionella risks. At Swiftclean, our assessments cover an introduction and background to Legionella, full site details, a Legionella management documentation audit, condition survey reports of domestic water plant, temperature profiling, photographic evidence, an asset register, identification of risks such as dead leg pipework and little-used outlets, recommendations for ongoing Legionella control and management, and a basic schematic of plant and distribution. All reports are kept up to date and reviewed regularly to support continued compliance with Legionella control regulations.

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Legionella Risk Assessment