Where can Legionella occur?


The legionella bacteria can be a risk in various environments, especially where the water can stand still for a long time at a temperature that is favorable for bacterial growth (between 20°C and 50°C). Here are some common breeding sites:

  • The presence of legionella in water pipes and systems is a serious health risk because people can become infected by inhaling nebulized water particles containing the bacteria. This can lead to veteran illness, a severe form of pneumonia, or the less severe Pontiac fever. Both conditions require immediate medical attention and can be particularly dangerous for the elderly, smokers and people with weakened immune systems.
  • Water towers and water storage tanks: These can be ideal breeding grounds for legionella if they are not maintained and cleaned regularly.
  • Climate control systems: Air conditioning systems, especially those with a cooling tower, are known for their potential for legionella growth if not properly maintained.
  • Sanitation systems: Showerheads and faucets that are not used regularly may contain stagnant water that becomes a breeding ground for legionella.
  • Swimming pools and spas: Without adequate chlorine treatment and regular temperature checks, these facilities can pose risks.
  • Medical equipment: Equipment such as humidifiers and certain types of respirators in hospitals can also become contaminated if they are not cleaned properly.


The presence of legionella in water pipes and systems is a serious health risk because people can become infected by inhaling nebulized water particles containing the bacteria. This can lead to veteran illness, a severe form of pneumonia, or the less severe Pontiac fever. Both conditions require immediate medical attention and can be particularly dangerous for the elderly, smokers and people with weakened immune systems.


For companies and institutions, it is essential to implement effective legionella management plans to minimize risks and ensure the safety of all building users. Valor Services Group offers comprehensive solutions and specialized cleaning techniques to meet this challenge and maintain a safe, hygienic environment.

Legislation concerning Legionella
Management plans

Legionella legislation in the Netherlands

In the Netherlands, legislation concerning legionella prevention is included in the Drinking Water Decree under the Water Act. Managers of collective tap water installations, such as in buildings with a public function, are required to draw up a risk analysis and management plan to prevent legionella growth. The guidelines prescribe that water installations must be managed and maintained in such a way that the chance of legionella bacteria growing is as small as possible. In addition, there are specific requirements for the periodic performance of water analyses by an accredited laboratory.

Sampling and Cooperation with External Laboratories

Valor Services Group takes the safety and transparency of its services very seriously. We work with external, accredited laboratories to ensure the water quality in your systems. This partnership ensures impartial and accurate results in our legionella prevention services.

Sampling process: Our sampling process includes the following steps:

  • Preparation: Our technicians prepare the sites according to strict safety protocols to prevent cross-contamination.
  • Sampling: Samples are taken at critical points within the water system, as determined by the risk analysis.
  • Transport: Samples are transported to the laboratory under controlled conditions to maintain the integrity of the samples.
  • Analysis: The external laboratory analyses the samples using advanced techniques to detect the presence of legionella.
  • Reporting: Results are reported in detail with recommendations for further action.

This accurate and transparent approach ensures that all preventive measures and treatments are based on reliable data, which is crucial for the effectiveness of the legionella management plan.

Legionella Management Plans: Professional Legionella Management Plans by Valor Services Group


Valor Services Group is your expert in developing comprehensive legionella management plans. With our advanced chemical and thermal cleaning methods, we guarantee safety and compliance with the highest hygiene standards.

Why choose Valor Legionella Management Plans?

Maximum Safety and Hygiene

Our legionella management plans provide a safe and hygienic environment, free from legionella bacteria, essential for both private and commercial buildings.

Compliance with Regulations

We ensure that your installations comply with current laws and regulations, avoiding fines and keeping your reputation intact.

Advanced Cleaning Techniques

Thanks to our expertise in chemical and thermal cleaning, we effectively eliminate legionella and prevent future infections.

Expert Technicians

Our technicians are highly trained and specialized in legionella prevention and treatment, so you can be assured of the best service.

Tailored Solutions

Each situation is unique. That is why Valor offers tailor-made legionella management plans that are specifically tailored to your needs.

5 Benefits of Valor Legionella Management Plans and Risk Analysis

  • Optimized Water Quality: Constant monitoring and maintenance ensure impeccable water quality.
  • Long Lasting Protection: Our methods provide sustainable protection against the risks of legionella infection.
  • Cost savings: Prevent costly emergencies and repairs with preventive maintenance.
  • Expert Support: Direct access to our experts for advice and support.
  • Improved System Reliability: Regular inspections/sampling and maintenance increase the reliability of your water and heating systems.

Frequently Asked Questions (FAQ)

Legionella is a bacteria that can cause severe pneumonia, known as Legionnaires' disease. It is especially dangerous for people with weakened immune systems.

Legionella management plans should be reviewed regularly, at least annually, to guarantee effectiveness and comply with new regulations.

Chemical cleaning includes the use of specific chemicals to eliminate legionella bacteria and biofilm in water pipes and systems.

Yes, thermal cleaning, raising the water temperature to a level where legionella bacteria cannot survive, is a very effective method.

For more information about our legionella management plans or other specialized cleaning services, visit our website or contact us directly. Ensure a safe and clean environment with Valor, your expert partner in hygiene and air quality.

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Contact Valor Services Group

For more information about our legionella management plans or other specialized cleaning services, visit our website or contact us directly. Ensure a safe and clean environment with Valor, your expert partner in hygiene and air quality.

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