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Legionella bacteria is commonly found in water. Inhaling airborne water droplets containing legionella bacteria can cause potentially fatal Legionnaires’ disease. Intergrated Compliance will help you manage legionella in hot and cold water systems and will work with you to identify and reduce the risks.

All businesses and organisations with public access to their water have a legal duty of care to ensure that a risk assessment is in place to monitor for legionella, a deadly waterborne bacterium. In the event of an outbreak of legionnaires’ disease, the authorities will require evidence of risk assessment, monitoring and maintenance, without this in place organisations will be dealt with most severely by the Health and Safety Executive (HSE). Failure to meet with the required compliance requirements may result in prosecution and litigation.

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Your consultant will carry out a legionella risk assessment.
Water that is used, stored, or equipment that acts as a means of
transmitting water droplets will be assessed. This may include:

  • Cooling tower systems
  • Evaporative condensers
  • Hot & Cold Water Systems
  • Spray humidifyers and air washers
  • Spa baths and pools
  • Firefighting systems.



This assessment will be reviewed every two years. This may be to review:

  • Changes to the system or its use
  • Changes to the use of the building
  • New information on risk or control measures
  • Results showing that control measures are no longer effective

Step 3


We provide you with a Legionella Risk Assessment report covering the following:

  • Site details
  • Actions requiring immediate attention
  • Description of premises
  • Action plan
  • Risk assessment
  • Scheme for controlling the risk
  • Photographs
  • Schematics of water distribution system
  • Domestic water temperatures and delivery temperatures




Ensuring your business is fully compliant with Health and Safety laws.

water safety


Delivering water log books and water safety management manuals to suit your requirements.

skilled consultants


Providing quality combined risk assessments/audits

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Legionella Pneumophila (otherwise known as Legionnaires disease) are generally associated with Legionella bacteria, of which there are over 50 known species.

Legionella bacteria are commonly found in water. Inhaling airborne water droplets containing bacteria can lead to potentially fatal Legionnaires disease. Integrated compliance can help you to manage the risk of exposure to legionella bacteria in hot and cold water systems and will work with you to identify and reduce the risks.

Where does it come from?

Legionella bacteria are prevalent in all natural water systems such as rivers, reservoirs and ponds. However due to conditions, people rarely contract the disease from these sources. Outbreaks of the disease arise from exposure to legionella, growing in purpose built systems where the water is presented within a temperature range suitable enough to boost growth. Legionella bacteria’s optimal growth temperature is 37˚C, this temperature reflects the Homeostasis (Core body Temperature) for human beings, making us susceptible to contracting Legionnaires Disease.

How do people get it?

Legionnaires disease is contracted by inhaling small water droplets (aerosols suspended in the air which contain bacteria). Specific conditions can increase the risk from legionella if:

  • The water temperature distributed is between 20-45 which is an ideal temperature for growth.
  • It is possible for breathable water droplets to be created and dispensed e.g. aerosol created by cooling towers, water outlets, fountains and showers.
  • Stored water and/or re circulated water
  • Deposits present that support bacterial growth, providing a source of nutrients for the organism e.g. rust sludge scale, organic matter and biofilms


Who can undertake the risk assessment for legionella?

As an employer or a person in control of premises, you must appoint person or persons responsible for helping you manage your health and safety duties, e.g. take responsibility for managing risks. A competent person is someone with the necessary skills, knowledge and experience to manage health and safety, including the control measures. You could appoint one, or a combination of:

  • yourself
  • one or more workers
  • someone from outside your business

If you decide to employ contractors to carry out your risk assessment or other work, it is still the responsibility of the competent person to ensure that the work is carried out to the required standards. Remember, before you employ a contractor, you should be satisfied that they can do the work you want to the standard that you require.

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