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Cooling down with a hidden risk: Legionella from misting systems and showers
Misting systems and showers bring welcome relief from the heat — but with poor management, also a real Legionella risk. Why "we've never had any trouble with it" is no reassurance, and what operators should do this summer.

Jonatan De Winne
Jun 28


Why we can no longer enjoy the Water Organ in the Efteling
Legionella in pretparken: waarom plezier en veiligheid samengaan.
Efteling sluit Waterorgel om legionella — maar het kan ook anders.

Jonatan De Winne
Jun 17


The problem related to a sampling frequency too low for Legionella.
Legionella bacteria multiply exponentially under favorable conditions: stagnant water, temperatures between 25°C and 45°C, and organic deposits in the system. An annual measurement provides only a snapshot and may not reflect a complete growth cycle. This is not just a theory. Our practical experience shows that a facility can still be considered safe against Legionella in October, but reach dangerous levels as early as six months later. How often do we recommend follow-up? C

Jonatan De Winne
May 28


Legionnaires' disease legislation: constraint or guideline?
We all know that feeling. Regulations land on our desks, or are explained—partly by us—and the first reaction is a deep sigh. Another thing to take care of. Another task, another file, another responsibility to add to the calendar. But what if we stopped looking at things from a different perspective? What if legislation wasn't the endpoint of a tedious process, but rather the starting point of something valuable? The origin: why does legislation on Legionnaires' disease exis

Jonatan De Winne
Mar 22


Legionella doubling time: unknown and underestimated
When a building is temporarily closed, for example for closing days, holidays, or due to unforeseen circumstances, water stagnates in the pipes. However, many operators underestimate how quickly Legionella bacteria can multiply during this period, especially when the temperature in the pipes reaches a favorable level. We recently visited a site that was closed for two consecutive days each week. During this closure, the water in the cold water pipes and hot water taps reach

Jonatan De Winne
Jan 28


Squeeze showers in kitchens: an often underestimated risk of legionella
In kitchens of restaurants, residential care centers, schools, cultural centers, and banquet halls, among others, squeeze showers are often used to wash dishes or rinse other (contaminated) materials. They seem harmless, but in practice, they pose an increased risk for the growth and spread of Legionella bacteria . Why squeeze showers pose a risk Squeeze showers consist of a flexible hose with a spray nozzle used to wash dishes. This type of use increases the organic load d

Jonatan De Winne
Dec 10, 2025


Legionella risk with calcified taps – an underestimated danger
Why calcified taps are a problem When carrying out Legionella risk analyses, we have encountered this very often: calcified tap work resulting in aerosol formation. Under normal circumstances, standard sink or basin taps pose little risk of Legionella contamination. When functioning correctly, they produce an even water jet with no aerosol formation, or, depending on the type of tap and the water pressure, minimal aerosol formation. But when taps become calcified and dirty, t

Jonatan De Winne
Dec 10, 2025


Leave that fire hose alone – Legionella risks at summer camps
Vul geen opzetzwembad met de brandslang. Een schijnbaar onschuldig tafereel eindigt zo mogelijks in een longontsteking.

Jonatan De Winne
Dec 10, 2025


Why student residences should be particularly vigilant against Legionnaires' disease this summer
Beknopte leidraad voor legionellapreventie in studentenkoten

Jonatan De Winne
Dec 10, 2025


A 58-year-old woman dies after contracting Legionnaires' disease: the crucial importance of temperature monitoring
Several French Belgian media outlets recently reported the death of a 58-year-old woman from Legionnaires' disease contracted after a visit to a wellness center. According to researchers, the hot water circulation system was faulty: an interruption in the flow created conditions conducive to the proliferation of Legionella bacteria. The victim's partner filed a complaint, and the Mons public prosecutor's office issued an appeal for witnesses to identify other victims in Mousc

Jonatan De Winne
Dec 10, 2025
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