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Legionella Risk Assessment

There are over 50 species of Legionella which is the cause of the deadly Legionnaires' disease, one of the fatal forms of pneumonia. Although Legionella is widespread in natural water sources such as lakes, rivers, it can also live in man-made systems such as water storage units, bathrooms, and kitchens posing a great health hazard if it goes undetected.

People are often infected by Legionella on breathing in minuscule droplets of water that have been sprayed into the air. The water droplets will contain Legionella bacteria that have grown in an environment of between 20 degrees to 45 degrees centigrade. Temperatures higher than 60 degrees will normally kill the bacteria. 

The Legionella bacteria grows naturally in the environment in ponds, lakes and rivers, so it is very hard to eradicate it totally and stop it entering our own water and sewage systems as they are closely connected. 

Small numbers of Legionella bacteria are generally not a threat to humans, but in a nurturing environment of the correct temperature, Legionella can explode into growth creating a slimy biofilm sticking to the surface of piping that has slow moving water or still water.

Legionella Testing

At Bison Assist we have a comprehensive control system for testing for Legionella including:


  • Identify and assess risk sources. Bison Assist as a Legionella Control Association member has a great deal of experience undertaking Legionella Assessments across a variety of industries.
  • Prepare a scheme for preventing or controlling the risk. We can complete a full and comprehensive Legionella Assessment providing a detailed report containing any recommendations to ensure that your business complies with all the current legislation, a full schematic drawing of the water system and water testing in a timely manner.
  • Implement and manage precautions. Employers have a legal responsibility to identify potential risk areas and must put measures in place to control any risk factors.
  • Keep records of precautions implemented. Businesses are required to implement and manage precautions and keep records of the above procedures.


Legionella Testing

Businesses are required to meet compliance following the Health and Safety at Work etc Act's (1974) Approved Code of Practice - The control of Legionella bacteria in water systems (L8 - Fourth edition 2013), RIDDOR 2013 and COSHH 2002. You can trust Bison Assist to ensure that your workplace is safe from the threat of Legionella.

Once you join Bison Assist you can rest assured that we will ensure you are and will remain compliant with all current rules and procedures.

At Bison Assist we have expertise in all areas of risk assessment and compliance solutions. We can offer a full package of risk assessments to our customers allowing them to concentrate on their core businesses. By choosing Bison Assist you can rest assured that you are in safe, professional hands. Our consultants can organise your risk assessments with the minimum of disruption to your daily routines.

Bison offer a wide range of risk assessment services throughout the UK. With nationwide reach, we work with both the public and private sector, including healthcare, dentistry, education, medical, business centres, warehouses, residential properties, industrial sector, commercial properties. 

Interim Health Check

Interim Health Check