Legionella Risk Assessment – Managing The Process

Legionnaires Disease strains under the perfect conditions in cooling systems and a building’s new water storage distribution system. If these are not cleaned, disinfected and maintained it could result in creating the conditions for the Legionella bacteria to multiply. The government is security advisory body, Health and Safety Executive, in its own AcoP L8 guidelines recommends that to ensure the security of all employees and visitors building managers will need to perform checks and maintenance of water systems every six months. The key processes in the management of Legionella include the running of risk assessment of the risks, implementation of monitoring and inspection programs. There should be a complete cleaning and disinfection of all water systems and replacement or refurbishment to any parts of towers and tanks.

Legionella Risk Assessment

The Legionella risk assessment should include a comprehensive review of the water system for any building with more than 5 occupants. Professionals conduct assessments of the system and water storage facilities whether used for distribution of water or as part of their buildings air conditioning or heating. Assessment of the hygienic conditions and how well they are being preserved is important for preventing the growth of circumstances that will enable for the rapid breeding of Legionella bacteria. This assessment examines the management systems in controlling the threat of Legionella contamination and how competent they are. The Legionella Risk Assessment examines all likely areas of potential threat for nourishing and encouraging bacterial growth if left unattended. These include cooling systems, evaporation condensers, hot and cold water systems in addition to all areas that contain water which are most likely to attain a temperature over 20°C or involves the discharge of a spray or effect.

Of primary importance in maintaining Legionella bacteria at bay is the execution of a successful monitoring and review procedure which ensures the cleanliness of all water systems. This includes all areas’ examination; testing of water temperatures and running dip slide dimensions. Water systems should be regularly cleaned out, eliminating any bio movie, debris and rust that may act as nutrients for the bacteria. The water should be treated with silver based hydrogen peroxide or chlorine biocide etc to ensure the quality of the water. Towers and tanks should be cleaned of any built scale up using chemicals. Whether there are plumbing difficulties or a significant system failure it is necessary to alter any broken or missing parts instantly. Any performance of the water system may lead to a rise in multiplication and temperature in amounts of algae such as Legionella bacteria. Legionnaires disease is a really dangerous condition, which if not monitored carefully and the appropriate measures put in place to stop its spread, may cause infection of individuals as well as passing on an epic scale. Care should be taken to inspect areas and ensure tanks are washed and water systems maintained safe.

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