Legionella Services at Thames Laboratories

Legionella pneumophila and related bacteria are commonly found in natural water sources like rivers, lakes, and reservoirs, but they can also thrive in man-made water systems, including cooling towers, hot and cold water systems, and spa pools. In favorable conditions, these bacteria multiply, increasing the risk of Legionnaires’ disease. Over 60 species of Legionella bacteria have been identified, with more than 25 known to cause disease in humans.

Legionellosis refers to illnesses caused by Legionella bacteria, including Legionnaires’ disease, Pontiac fever, and Lochgoilhead fever. The most serious form of Legionellosis is Legionnaires’ disease, a severe pneumonia with a relatively high fatality rate. While anyone can contract Legionnaires’ disease, people who are elderly, immunocompromised, or smokers are at higher risk. For more details, visit the NHS website [here].

It’s a legal requirement to assess and manage the risks associated with Legionella to protect your employees, residents, or the public. Compliance with the ACOP L8 (Approved Code of Practice for Legionella) is essential, requiring a risk assessment to identify any potential risks and exposure sources. The HSE has provided a brief summary of the dutyholder’s legal responsibilities, for more information click here.

A Legionella Risk Assessment (LRA) is a vital step in ensuring compliance with the ACOP L8. The assessment identifies any risks, and if any hazards are found, a control scheme must be implemented to manage them. A ‘responsible person’ must be appointed to oversee this scheme, and they should be competent and knowledgeable about the water system. Thames Laboratories can conduct thorough assessments and provide detailed reports, including:

• An evaluation of the water system’s usage and potential exposure risks.
• An analysis of the condition of all water system components.
• A schematic diagram of the system.
• An assessment of your current management structure and any necessary adjustments for full L8 compliance.
• Photographs of problem areas.
• Recommendations for any remedial work.
• Microbiological sampling, if required.

While there is no fixed lifespan for a Legionella Risk Assessment, it should be reviewed regularly, particularly if changes occur. Thames Laboratories recommends conducting a reassessment at least once every two years to ensure ongoing compliance and risk management.