For both medium-risk and high-risk establishments, water samples must be taken from your installation every year in order to check whether it is free of Legionella. Only a laboratory accredited for this purpose may examine whether the samples are contaminated with the legionella bacteria and, if so, which type of Legionella is involved.
The following figures are used as a basis for the mandatory legionella samples to be taken. This may vary depending on the risk analysis.
Totaal aantal tappunten in uw leiding | Aantal te onderzoeken tappunten |
Tot en met 50 | 2 |
51 – 100 | 4 |
101 – 200 | 6 |
201 – 400 | 8 |
401 – 800 | 10 |
801 – 1600 | 12 |
Meer dan 1600 | 14 |
Contact our Technisch Commercieel Manager – Labo
The classic plate count method is used as the standard. In this method, growth on specifically designed plates is examined after ten days. After this period of ten days, a qualitative (serotype sort) and quantitative (number of colony forming units) can be registered..
It is also possible to opt for the Polymerase Chain Reaction (PCR) method. Using this technique, the presence of Legionella in the analysed sample can be determined after 24 hours. This technique is very efficient in cases of existing problems due to the fact that results are available at very short notice ensuring that the situation can be dealt with promptly. For example, newly cleaned water outlets can be made available more quickly.
This analysis is recommended whenever there is any doubt about the water quality in your installation. For example, it may transpire during a legionella analysis that there is an excess of other types of microorganisms. This excess can become so severe that the presence of legionella cannot be established. Measuring which microorganisms these are means that you are able to deal with them and ensure that your installation is cleaned one more time.
The following microbiological parameters are used for this:
Need help with analyzes? Our specialists are happy to help you. Get in touch with us for more information.
All microbiological analyses need to be carried out in a reliable manner. That is why we are ISO17025 accredited (080-TEst BELAC). We also have several other endorsements. Read more on this here.
Cooling towers fall under a separate ruling in the Legionella Decree. For these installations, other sampling frequencie...
You are subject to specific legislation dependent on the purpose and the source of the water in question. Some of wh...
The basis of a legionella prevention and management starts with a risk analysis and management plan (RABP), as set out i...
We carry out both bacteriological and chemical analyses in our laboratory. We incorporate the results into a report that...
Good Food Quality Assurance is very important for the organisation. Increasingly higher demands are made for a reason. A...
How do consumers really perceive quality of fresh produce? Monitoring of fruits and vegetables in supermarkets. Every we...
Door bundeling van alle expertises helpt Normec Foodcare met allerhande vraagstukken en oplossingen op het gebied van procesbeheersing, kwaliteit en voedselveiligheid, laboratoriumonderzoek, smaaktesten, QA-automatisering, flexibele inzet van kwaliteitsmanagers en keurmeesters, opleidingen en trainingen, risicomanagement en etiketcontrole.
Wil u meer weten? Neem contact met ons op.
Ben jij enthousiast over deze e-learning module? Bekijk dan de andere e-learning modules en trainingen in ons aanbod. Natuurlijk kan je ons ook altijd bellen voor een adviesgesprek, we horen graag van je!
By bundling all expertise, Normec Foodcare helps with all kinds of issues and solutions in the field of process control, quality and food safety, laboratory research, taste tests, QA automation, flexible deployment of quality managers and inspectors, education and training, risk management and label control.
Do you want to know more? Please contact us.