Ross Jones
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Legionella Risk Assessments
Legionella bacteria is responsible for the potentially fatal respiratory condition known as Legionnaires' disease. This remains a significant health threat in commercial buildings and residential properties, with an estimated 200-250 confirmed cases each year in England and Wales, and possibly many more undiagnosed.
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About the service
A Legionella Risk Assessment identifies the presence of Legionella bacteria. Given that 10% of cases where people infected with Legionnaires' disease may succumb to it, conducting an LRA is a vital action that could potentially save lives. Our assessment checks environments where Legionella could thrive, particularly in water systems that are ideal breeding grounds for these harmful bacteria.
Legionella thrives in water systems that are not frequently used or poorly maintained. The most common sources include:
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Showers and Taps
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Decorative Fountains and Water Features
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Hot Water Tanks and Heaters
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Large Plumbing Systems
During our assessment, we will conduct in-depth surveys around the building, ensuring any and all potential risks of Legionella are minimised and removed. We will also advise on the best measures to take in the future.
What's included?
We’ll identify, manage and minimise the risk of Legionella bacteria in water systems during our assessment.
All water systems on the premises are identified and mapped, including hot and cold water systems, cooling towers, and any other areas where water is stored, circulated, or used such as storage tanks, pipework, outlets, pumps. Other components are visually inspected.
Legionella bacteria thrive in water temperatures between 20°C and 45°C. The assessment includes checks to see if water is kept within these temperature ranges. Stagnant water can encourage bacterial growth, and we also identify conditions that promote the growth of Legionella, such as limescale, corrosion, or biofilm.
We review how water is used throughout the premises, looking at frequency and flow rates that could impact the risk of Legionella growth and evaluate any current Legionella control methods, such as water treatment processes, temperature controls, cleaning processes and regular system flushing.
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